star trek science officer uniform

Screen Rant

Star trek’s starfleet uniform colors: what they mean & why they changed.

From the 22nd century, a gold Starfleet uniform meant command, until it switched from gold to red between Star Trek: TOS and TNG - why the change?

• Star Trek's uniform colors have changed over the years to reflect different meanings and visions of the franchise's costume designers.
• In the original series, blue represented medical and science divisions, gold denoted command positions, and red was worn by engineering, security, and communications divisions.
• The switch from red to gold uniforms in the 24th century was likely a decision made by Starfleet to move away from the negative association with red uniforms ("redshirt" deaths).

Star Trek 's iconic uniforms have through a variety of changes in color designation and design in the past 57 years for a variety of reasons. In Star Trek: The Original Series ' unaired pilot, there were only two colors - blue for the science and medical divisions and gold for everybody else. Due to the costs involved in mounting a second pilot for the network, the gold uniforms were retained for TOS ' successful pilot, "Where No Man Has Gone Before". After that Star Trek embraced the gold, blue, and red uniforms that were an integral part of TOS ' iconic visual style between 1966 and 1969.

The meaning of gold, red and blue have changed over the years and so too has the way that those colors are displayed on the uniform. This is understandable for a franchise that has been running for 57 years. Each new costume designer will have their own vision for how they think Star Trek 's uniforms will look, and which characters would best suit which color. For example, Robert Blackman adapted original Starfleet uniform designer William Ware Theiss' Star Trek: The Next Generation uniforms for the 90s Trek shows and subsequent movies. Although he redesigned the outfits, Blackman honored the new color meanings decided upon by Theiss.

What Star Trek’s Uniform Colors Mean

In the entire history of Star Trek , blue has always denoted that the officer wearing the uniform is attached to Starfleet's medical or scientific divisions. During the 23rd century, the gold uniform denoted command positions and were also worn by Star Trek 's ace helmsman Lt. Hikaru Sulu (George Takei) and navigator Lt. Pavel Chekov (Walter Koenig). The red shirts were worn by the engineering, security and communications divisions. The red shirts also had an unfortunate association with the countless members of Starfleet away teams that were killed in the line of duty. Meanwhile, Kirk's green uniform was usually reserved for diplomatic functions.

By the 24th century there had been a switch around of Starfleet uniform colors and their relevant associations. Captain Jean-Luc Picard (Patrick Stewart) wore a red uniform throughout Star Trek: The Next Generation , rather than a gold one, so too did his Number One, Commander William T Riker (Jonathan Frakes). Meanwhile, the gold uniforms were worn by everybody with an operational role from security down to engineering, with occasional Enterprise-D helmsmen wearing red uniforms, like Lt. Geordi La Forge (LeVar Burton) in TNG season 1.

Why Star Trek’s Uniform Colors Changed

There's never been an in-universe explanation for the red and gold switch between Star Trek 's 23rd and 24th centuries. It can easily be explained by an operational decision made by Starfleet's wardrobe department to break away from the problematic " redshirt " association. Similarly, the more sober gray uniforms in Star Trek: Deep Space Nine and the Star Trek: The Next Generation uniforms could have been designed to reflect the war footing that Starfleet had found itself on while in conflict with the Dominion.

The real-life explanation for why Patrick Stewart and Jonathan Frakes weren't dressed in gold is more interesting, however. There are apocryphal stories that Stewart and Frakes didn't look as commanding in the gold uniforms designed by original Star Trek: TNG costume designer William Ware Theiss. It's certainly true that the dark red uniforms worn by Captain Picard and Commander Riker pop better on screen than the gold uniforms worn by the ops team. More interesting still, Lt. Commander Data (Brent Spiner) was supposed to be in science division blue, but it was a bad color for his pallid android skin tone.

Starfleet Uniform Variants In Star Trek

Interestingly, Scott Bakula's Star Trek: Enterprise went back to the color distinctions from Star Trek: The Original Series. Each of the blue flight suits had colored piping around the shoulders reflecting yellow for command and red for operations. The only notable difference was that Lt. Hoshi Sato (Linda Park) had the blue piping of the science division on her uniform to reflect her role as the Enterprise NX-01's linguist and translator. It's thanks to Hoshi's scientific research into alien languages that Lt Nyota Uhura (NIchelle Nichols) can maintain hailing frequencies in her operational position aboard the USS Enterprise.

Other notable uniform variants are the similarly blue uniforms from Star Trek: Discovery which had gold or silver cuffs and side panels for command and operations, respectively. The iconic crimson movie costumes had different colored turtleneck sweaters under the tunics, presumably to denote crew role. Prior to those iconic crimson outfits were the poorly received monochrome uniforms designed for Star Trek: The Motion Picture , which were sometimes referred to as space pajamas. The longer that the franchise continues into the future, the more likely it is that Starfleet uniforms will continue to adapt and change. However, Star Trek: Discovery 's far future uniforms prove that Star Trek 's command red is very much in style almost a millennium after it was first introduced.

Star Trek Uniforms Fully Explained

Since its premiere more than 50 years ago, Star Trek has been at the center of a growing web of culture, television, film, and fandom. With nine television series and 13 films, with undoubtedly more to come, there is a wealth of material to analyze and enjoy. Today, an enthusiastic fan can take just a single aspect of the Star Trek universe and dive into it for weeks.

Take uniforms. A seemingly simple concept, right? Star Trek generally focuses on the experiences of people serving in Starfleet, essentially a futuristic version of the Navy in space. So, Starfleet uniforms should be fairly consistent, even boring. Everyone's supposed to look like a cohesive group, so there should be little variation.

However, the uniforms of Star Trek are so varied and connected to the intricate fictional world of the franchise that it's pretty fascinating. Someone appearing on Star Trek: The Next Generation and then showing up again in a film like Star Trek: First Contact will probably have to fit themselves into two very distinct outfits. With more than five decades of stuff to go through, says CNET , there's a dizzying variety of looks for what's supposed to be a pretty staid quasi-military organization.

Practically everything about the history of Star Trek uniforms is linked to behind-the-scenes stories, real-world creativity, in-universe drama, and even a touch of fashion history here and there. From color, to cut, to material, there's a lot to learn.

Color is key to Star Trek uniforms

In Star Trek: The Original Series , which ran from 1966 to 1969, you can't miss the brightly hued uniform shirts sported by the crew of the starship Enterprise . Captain James T. Kirk and other members of the command staff sport golden yellow tops, says Mental Floss . Blue is reserved for the science department and medical personnel, so you'll see it on Mr. Spock, the second-in-command, and the ship's physician, Doctor McCoy.

And what of the folk in red uniforms? According to Star Trek lore, these poor "redshirts" are little more than cannon fodder, though, officially, red is for communications, admin, and security. If you're watching an episode where a random, red-clad crewmember is asked to beam down to the planet with the main cast, don't get too attached. They're probably going to get zapped, eaten, or otherwise annihilated to further the episode's plot.

Of course, there are some exceptions. Statistically speaking, says Nerdist , redshirts are not that bad off. Consider also that red shirts adorn major characters like Scotty, the ship's chief engineer, who made it through the entire series.

Now that you've got that settled, remember that it's only good for one series. In later Star Trek shows, red and gold switched places. Captains like The Next Generation 's Jean-Luc Picard wore a dark red, while his security chief, Worf, wore gold.

Starfleet rank is shown by pips and stripes

Like so many real-world military organizations, Starfleet hinges on rank. Crewmembers are expected to follow orders, but on starships that can carry thousands of people, who are they supposed to take seriously? That's where the rickrack comes in.

In Star Trek: The Original Series , rank was denoted by stripes of gold ribbon on someone's sleeves. The more stripes, the higher the rank. Generally speaking, says Atlas Obscura , two or three stripes means a captain. Commissioned officers are a safe bet for one stripe. Non-commissioned people get either a bit of braid or nothing at all. The stripes were brought back for the reboot films beginning in 2009.

The follow up series, Star Trek: The Next Generation   went for something different during its 1987 – 1994 run. The colors became a more muted, and the old rank stripes, which, frankly, looked like something you might have picked up from your local craft store, were retired. In their place, officers wore "pips," subtle little pins, on their collars. The higher someone's rank, the more pips they sported.

Other films played around a bit with the rank symbols, like the different colors and badges shown in 1982's Star Trek II: The Wrath of Khan . Still, they weren't too off the original mark. Generally speaking, the more junk on someone's uniform, the more likely it is that you'll have to follow their orders.

The original series went for velour

Futurama 's Zapp Brannigan character, a send-up of Captain Kirk, is all about his velour uniform. The first Star Trek series really was into luxurious velour, too, but the fabric proved challenging to maintain. It's not as if the 1960s were known for comfortable natural materials, after all.

According to Esquire , the fabric initially used in Star Trek: The Original Series was a little flashy. Costume designers used a stretch cotton velour for the tops, with a black synthetic Dacron infused with sparkles for the pants. Both materials were meant to subtly glitter under studio lights, lending the uniforms a shimmery, 23rd-century, spacefaring feel. 

Unfortunately, the velour was a flop. Many called it "that rotten velour," noting that the fabric tended to shrink in the wash and could tear easily. In the third and final season, designers substituted it for a double-knit nylon, says CNET , which proved to be a much hardier fabric, especially when it got thrown into the washing machine.

Captain Kirk's special green shirt was a little embarrassing

Originally, reports Atlas Obscura , the command staff of Star Trek: The Original Series was supposed to be sporting a muted green. Under the studio lights, though, the cameras read the green velour as a golden yellow. The production team simply went with it for the rest of the series.

Careful observers of the 1960s run will note that Captain Kirk is sometimes seen in a very green tunic-style shirt. According to an interview with series costume designer Bill Theiss , that's because it was made out of a different material. That particular shirt looked genuinely green. This is also why some of the colors in the original series seem to change, said Theiss. Even the miniature of the Enterprise could appear ever so slightly green under the right conditions.

William Shatner, the Canadian actor who played Kirk, wasn't necessarily fond of the tightly wrapped look, says Cinemablend . "It was a little embarrassing after lunch to have that tight green thing on you," he said.

Star Trek's women went from pants to miniskirts

The first pilot episode of Star Trek: The Original Series , " The Cage " is an odd duck. Though it was shot in 1964, it didn't make it to screens in its complete form until a Betamax release in 1989. Bits of the story were included in the season one two-parter "The Menagerie," but it contained only the briefest glimpses of what might have been.

These included things like a smiling Spock, different uniforms, and a woman in command wearing pants . Star Trek: The Original Series is notorious for its gendered uniforms. The men wore pants and long-sleeved shirts. Female crewmembers were confined to miniskirts so short that Lieutenant Uhura, the communications officer, always seemed on the verge of an embarrassing situation when she sat down.

That's partially why Number One, the second-in-command in "The Cage," stands out: She's wearing pants. Number One, played by Majel Barrett, is also a daring commander. But she wasn't considered right for the character. When Star Trek got its second pilot, none of the women were in command, and certainly none of them wore pants. Barrett returned, albeit as the emotional, mini-skirted Nurse Chapel.

Nichelle Nichols, who played Uhura, offers up a counterpoint. "I was wearing [miniskirts] on the street," she told the BBC . "What's wrong with wearing them on the air? [...] It was the era of the miniskirt. Everybody wore miniskirts."

The first Star Trek movie shook took uniforms in a weird direction

Star Trek: The Motion Picture looked like it was going to be a big deal. The 1979 film was the first time that fans would get to see their beloved crew on the big screen. Anticipation was high. Then, the movie debuted.

It landed with a dull thud. While die-hard fans still got enjoyment out of Star Trek 's film debut, most viewers couldn't get past the plodding story and dialogue-heavy scenes. It made just enough profit to justify a sequel, to be sure. SyFy contends that The Motion Picture did originate some interesting new trends for the franchise, like wearable communicators and redesigned Klingons . Still, few would point to this entry as their favorite Star Trek movie.

Some of the blame surely lies with the redesigned uniforms. Where The Original Series had colorful, if somewhat cartoonish togs for the crew, The Motion Picture made it look like everyone was going to the weirdest slumber party ever. According to Memory Alpha , the crew was now outfitted in two-piece tunics and one-piece jumpsuits in mind-numbing shades like pale blue and beige. At least the women on the crew were dressed in the same jumpsuits worn by the men. They might have looked oddly dull for space adventurers, but crewmembers like Lt. Uhura didn't look like they needed to worry about errant breezes. And, if nothing else, the space pajamas look pretty comfortable.

The Wrath of Khan redeemed Star Trek uniforms while cutting costs

Though Star Trek: The Motion Picture began the series tradition of changing Starfleet uniforms at every opportunity, rebooted uniforms didn't get very eye-catching until the second film. In Star Trek: The Wrath of Khan, both the plotting and the uniforms got a much-needed upgrade.

To be fair, the striking red jackets of The Wrath of Khan wouldn't have existed as we know them if it weren't for the beige jumpsuits of The Motion Picture . As revealed by Empire , costume designer Robert Fletcher, burned somewhat by his experiences on the first film, decided to stay on in an attempt to redeem his craft. Fletcher still had to work within budget, says Forgotten Trek . Indeed, the budget was smaller, since the studio had been spooked somewhat by the lackluster performance of the first motion picture. As a result, Fletcher rather cleverly utilized the old movie uniforms. His team dyed the tunics red because that was the shade that took best to the fabric. 

Meanwhile, Fletcher added a few more militaristic details to the revamped uniforms, like boxy shoulders, stripes, and shiny rank insignia. Fletch referred to it as "Hornblower in outer space," referring to the popular Horatio Hornblower series, set in the era of the Napoleonic Wars. The maroon color proved so successful that it persisted far beyond the film and back onto television with the follow-up series, Star Trek: The Next Generation.

Star Trek: The Next Generation's uniform was all about spandex

While the uniforms debuted in Star Trek: The Wrath of Khan were structured, boxy outfits inspired by military getups, the theme wasn't going to last, for William Ware Theiss, who designed the costumes for Star Trek: The Original Series , was ready to completely revamp even his own designs. Theiss was called upon to design the costumes for the first year of Star Trek: The Next Generation , the follow-up series that premiered in 1987. According to Forgotten Trek , Theiss wanted to pull back from the structured look of Wrath of Khan and return to a softer appearance.

That meant spandex. Specifically, Theiss employed a heavyweight material, of the type often used for swimsuits. He also changed the color scheme, making red the color for command staff, while gold was switched to engineering and security. Blue remained the key shade for medical and science personnel.

While designers might have liked the spandex, it got poor reviews from the actors. The form-fitting material was unforgiving of a heavy lunch or brief dalliance with a slice of cake. Robert Blackman, who replaced Theiss in later seasons, came to the rescue with a different cut and wool fabric. Unfortunately, only the male actors got the best changes, like two-piece uniforms. Female actors like Marina Sirtis, who played Counselor Troi, were stuck in uncomfortable one-piece jumpsuits for a while longer.

Deanna Troi's exception confused Trek fans

In Star Trek: The Next Generation , ship's counselor Deanna Troi was actually a Starfleet officer, but you wouldn't know it from her clothes. While everyone else on staff was wearing the regulation Starfleet uniform, Troi was often stuck in revealing onesies that recalled the first film's unfortunate jumpsuits. 

It may have something to do with Troi's gender. As quoted at Forgotten Trek , Marina Sirtis, who played Troi, took a dim view of how the show treated female characters. "The women on this show are very non-threatening," she said. "You don't see women in power positions." Troi was meant to be a soft, caring therapist. Perhaps her clothing was meant to reflect that gentleness, but with an admittedly sexist twist that lowered her necklines and kept Sirtis trapped in revealing spandex for much longer than her coworkers. Too often, her clothes reflected stories where Troi was made to be helpless or even outright dull for the sake of the plot.

Counselor Troi finally got to wear the real uniform in "Chain of Command, Part 1," a season six two-parter. In it, Captain Jellico, an uptight fill-in for Captain Picard, curtly tells Troi to just wear the uniform already. While the impetus for the wardrobe change might have been embarrassing for her character, Sirtis was delighted. As she told the BBC , "I was thrilled when I got my regulation Starfleet uniform [...] I got all my brains back."

The "skant" tried to reach gender equality but fell flat

We should give Gene Roddenberry some credit. While he was often of his time for things like scantily clad secondary characters on Star Trek: The Original Series , he genuinely tried to push back against cultural assumptions. Sometimes, it worked and became practically legendary, as when he helped to create a diverse bridge crew on the first television series. Other times, he pushed for costume parity that simply didn't land.

Roddenberry was involved with the production of Star Trek: The Next Generation from its 1987 premiere until shortly before his death in 1991. He was part of almost everything in the series, including the costume design. As reported by Star Trek.com , Roddenberry directed designer William Ware Theiss to design what became known as the "skant."

This take on the minidress was made out of the same spandex as the other uniforms. It was also meant to be unisex. Crewmembers of any gender would be able to wear the thigh-baring skant. Yet, it was a hard sell. The skant was ever-so-briefly seen on a male crewmember here and there in the first season, says SyFy, but never after that. Female crew like Counselor Troi wore it a bit longer, but actors and viewers alike thought it just made her look like a space cheerleader. Though you can understand what Roddenberry and company were going for, the skant just couldn't stay. It faded into fan lore and obscurity soon after the first season.

Star Trek: Deep Space Nine made the uniforms fit for actual work

Star Trek didn't stop with Star Trek: The Next Generation . The sequel series was followed up by a progression of films and further television series. These included Star Trek: Deep Space Nine , which premiered in 1993 and briefly ran concurrently with The Next Generation . Though both series are supposed to take place at roughly the same time, the uniforms seen on Deep Space Nine were a serious departure.

Costume designer Robert Blackman returned to the jumpsuit design but mercifully stayed clear of figure-hugging, back-breaking spandex, says Forgotten Trek . Instead, the looser jumpsuits were made out of wool. Blackman had, like earlier designers, discovered that wool took dye better than other fabrics and held up to repeated washings. 

The softer uniforms looked like they could exist in a real, workaday reality. Characters like Chief O'Brien can be seen in the bowels of Deep Space Nine, a scrappy space station inherited from its previous Cardassian occupants. His jumpsuit, based in part on a mechanic's outfit and NASA workaday gear, looks right at place in the more gritty, realistic world of Deep Space Nine .

Star Trek: Lower Decks brings back color and might explain a big mystery

Star Trek: Lower Decks is an animated comedy series, the first ever to take a look at the ridiculous side of Star Trek . While it's very definitely a silly take on the franchise, the Lower Decks series actually holds a clue to the ever-changing and seemingly inconsistent uniforms across the series.

In part, the uniforms of Lower Decks are an homage to a never-used 1994 redesign. According to Trek Movie , creator Mike McMahan realized the discarded uniform design for the Star Trek: Generations movie was just right for his series. It calls back to The Next Generation just enough to make connections but remains distinct and colorful in its new two-dimensional context.

This latest series might also help explain the constantly shifting Starfleet uniforms. Careful viewers may have already noticed that different ship and station crews sport wildly different looks, even when they're supposed to be taking place at the same time. 

Inverse points out the apparent fact that Starfleet uniforms seem to correspond to very specific ships and jobs. Someone sent to a space station like Deep Space Nine would wear one uniform, while another crewmember on Picard's Enterprise would sport something noticeably different. An outside viewer could still see they were Starfleet personnel but might correctly guess they were stationed in different places. The looks on Lower Decks , which are their own unique creations, add more evidence to support this theory.

Starfleet uniform

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Starfleet uniforms in 2371, showing two separate styles in use at once

A provisional officer's uniform alongside a standard duty uniform

Starfleet uniforms were uniforms worn by individuals serving in the Federation Starfleet , originally a United Earth organization. These uniforms facilitated the wearers' needs as both scientists and researchers , as well as Starfleet's military role. The uniform and combadge used by Starfleet personnel may vary by the ship or facility they were assigned to, or the officer's rank or department. These were often retained even when visiting other Federation locations. ( TNG : " The Child "; DS9 : " Homefront ", " Tears of the Prophets "; LD : " We'll Always Have Tom Paris ", " Kayshon, His Eyes Open "; DIS : " Saints of Imperfection ")

Casual duty attire also allowed for considerable variation of uniform aboard a Starfleet vessel, though it was ultimately up to the captain's discretion. Wearers were expected to abide by the Starfleet dress code , though special exceptions were sometimes made for certain aspects of an individual's cultural heritage, such as Worf 's Klingon baldric , Nog 's Ferengi headdress , and the earrings of Ro Laren , Kira Nerys , and Shaxs . ( VOY : " Learning Curve ", et al.) According to Elim Garak , " I think Starfleet should allow their officers more latitude in accessorizing their uniforms. You'd be surprised what a nice scarf can do. " ( DS9 : " Broken Link ")

On two occasions, the term " Federation uniform " was used to describe Starfleet uniforms.

In 2369 , the Bajoran civilian Mullibok , who was being evicted from his home , asked Commander Benjamin Sisko how many Federation uniforms he planned on sending down to have him removed. ( DS9 : " Progress ")

In 2372 , Chakotay referred to his as a Federation uniform as he explained to Kar how it was like the Jal name that the Kazon earned. Chakotay told him that his uniform was earned through " years of study ", and " learning about science and ships and navigation , " adding too, that he was further taught to be "[..] prepared us to defend ourselves in battle. They prepared us very well. And we had to pass many difficult tests before we were given the right to wear the uniform. " ( VOY : " Initiations ")

• 1.1 Command
• 1.2 Operations
• 1.3 Sciences
• 2.1.1 Type #1
• 2.1.2 Type #2
• 2.1.3 Type #3
• 2.1.4 Type #4
• 3 Uniform variations
• 4 Dress uniforms
• 5.1.1 Design
• 5.2 Ambiguous uniform
• 5.3 External links

Divisions [ ]

Starfleet uniforms were classified by color among the command, sciences, and operations divisions. Occasionally, the uniforms were also broken down by department, while displaying rank insignia conspicuously. The color scheme had varied over time throughout Starfleet history, but the uniforms were designed for comfort even in the most extreme environments. ( DS9 : " Trials and Tribble-ations ", " Let He Who Is Without Sin... ")

Command [ ]

The command division was the head of Starfleet, with most of the ranking officers in Starfleet Command wearing these colors. Generally, this division was responsible for the administration of starships , starbases , and space stations .

Operations [ ]

The operations division was the backbone of Starfleet, encompassing the engineering , security , and support departments. This division was responsible for technological innovation and for maintaining and defending the Federation.

Sciences [ ]

The sciences division was the heart of Starfleet, composed of the exploratory , medical , and mental health departments.

Uniform styles [ ]

Unknown eras [ ].

These Starfleet uniforms were introduced between the 24th and 31st centuries .

Type #1 [ ]

A female officer in an unknown uniform

This uniform was worn by an operations division officer , as seen in a photo within the Transporter Facility maintained by Chief Petty Officer Carlton Dennis . ( LD : " Grounded ")

Type #2 [ ]

A female junior officer in a uniform from an unknown era

This uniform was worn by one of Tal 's hosts . ( DIS : " Forget Me Not ")

Type #3 [ ]

A holographic representation of a female lieutenant

This uniform was worn by officers in an unknown era. ( DIS : " Su'Kal ")

Type #4 [ ]

Holographic representations of officers in uniforms from an unknown era

This uniform was worn by the delegation welcoming the Kelpien and Ba'ul Alliance into the Federation. ( DIS : " Su'Kal ")

In the 23rd century , similar uniforms had been in use as cadet outfits. ( DIS : " Through the Valley of Shadows ")

Uniform variations [ ]

Troi in her casual attire

Some officers wore alternate uniforms. Deanna Troi often wore casual clothing while on duty, and T'Pol retained her original Vulcan uniform with a few concessions to her Starfleet rank and ship assignment. Other officers, such as Worf, Montgomery Scott , and Ro Laren, were allowed to wear accessories relating to their culture with their uniforms, but this was at the discretion of the captain. Uniforms were also altered to accommodate non-humanoid officers, such as the three-armed, three-legged uniform of the Edosian Arex , and the uniforms for beluga whales Kimolu and Matt . ( ENT : " Borderland "; Star Trek II: The Wrath of Khan ; TNG : " Ensign Ro "; TAS : " Mudd's Passion "; LD : " First First Contact ")

Uniforms were also adapted to environmental or atmospheric conditions. When exploring the planet Tyree , Benjamin Sisko and colleagues wore long, flowing gown uniforms to deal with the sand . They featured a colored stripe to represent departments. ( DS9 : " Shadows and Symbols ")

Dress uniforms [ ]

Worf wearing his dress uniform with a Klingon ceremonial sash

Dress uniforms were a variant of the standard Starfleet uniforms worn for special occasions, such as weddings , courts martial , funerals , and the greeting of ambassadorial delegations and heads of state. ( TOS : " Court Martial ", " Journey to Babel "; TNG : " Lonely Among Us ", " Manhunt ", " Data's Day "; DS9 : " Move Along Home ", " Rules of Engagement "; VOY : " Course: Oblivion ", " One Small Step ", " Ashes to Ashes "; Star Trek: Insurrection )

Appendices [ ]

Background information [ ].

Patrick Stewart 's character of Jean-Luc Picard has appeared in more styles of Starfleet uniform than any other character on screen without story contrivances (like time travel , holodecks , or alternate timelines ) being involved.

For most of Star Trek 's history, Starfleet uniforms have had at least three division colors. Some characters have worn different division colors in different episodes. Leslie , Jae , Tom Paris , Harry Kim , and Sylvia Tilly have each been shown wearing three colors at different points (including, for Paris and Kim, alternate timelines and holodeck scenarios); however, the first character to wear all three division colors in one episode was Ensign Sam Rutherford , who wore operations gold, command red, and medical blue in LD : " Envoys ".

The Starfleet uniforms worn during Star Trek: The Original Series were designed by William Ware Theiss , who returned to design the Star Trek: The Next Generation uniforms (which were further adapted into future versions on Star Trek: Deep Space Nine , Star Trek: Voyager , and the TNG -era films by Robert Blackman ). Robert Fletcher designed the uniforms seen throughout the original series movies, with later new designs provided by Nilo Rodis .

Robert Blackman also designed uniforms worn on Star Trek: Enterprise , a design representing a precursor to those seen in TOS . The uniforms seen in Star Trek: Discovery were designed by Gersha Phillips . The uniforms in Star Trek: Picard were designed by Christine Clark .

Michael Kaplan designed the uniforms seen in Star Trek and Star Trek Into Darkness , and Sanja Hays designed the uniforms for Star Trek Beyond .

As shown in the It's A Wrap! sale and auction , a number of Starfleet uniforms have had padding to increase muscular appearance. Such cases include two costumes for Tom Paris , one racquetball costume for Julian Bashir , and a Deep Space Nine costume for Worf, to create a more Klingon appearance. According to Wil Wheaton , all the main cast members wore muscle padding during the first two seasons of The Next Generation , mainly because of the tight-fitting nature of the spandex uniforms used in these two seasons. [2]

Several prototype uniform undershirts to those seen in Star Trek II: The Wrath of Khan on were sold off on the It's A Wrap! sale and auction on eBay. [3]

Ambiguous uniform [ ]

Female on the Elysian Council

A Human female seen as a member of the Elysian Council in " The Time Trap " wore a uniform of ambiguous origin. It was described in the Star Trek Concordance as "a white suit with blue collar and an insignia on the left breast," and was suggested to "possibly [be] an early Star Fleet [sic] uniform". While it is known that the Bonaventure , and possibly other Earth/Federation ships, were lost in the years prior to 2269, it is unclear if this is indeed a Starfleet uniform, and, if so, from which era it originated.

External links [ ]

• Starfleet uniform at Memory Beta , the wiki for licensed Star Trek works
• 22nd & 23rd century Starfleet uniforms  at Ex Astris Scientia
• 24th century Starfleet uniforms  at Ex Astris Scientia
• Starfleet uniforms  at Spike's Star Trek Page
• Interview with William Ware Theiss at Phaser Resource (X)

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Star Trek: The Original Series Women's Deluxe Science Uniform

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You'll look like you stepped off the Starship Enterprise when you wear this Star Trek: The Original Series Women's Deluxe Science Uniform. This costume includes a form-fitting blue dress with a black collar shiny gold wrist bands and a replica Star Trek emblem pin. Look your best and impress Star Trek fans young and old in this officially licensed costume.

PRODUCT DETAILS: 100% PolyesterEmbroidered Star Fleet emblem on frontMetallic band around forearms

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Women's Star Trek TNG Deluxe Blue Science Officer Uniform Costume

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Science Officer Male Uniform Jacket - Star Trek Discovery

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The Men’s Star Trek – Discovery Science Officer Uniform Jacket costume includes:

Assume the broad responsibility of coordinating the science department of the USS Discovery, including descents to the planet surface as the leader of an away team. Remember always that it is a science officer’s job to “Have a better idea” – so sharpen your observational skills and power of speculation! The ship may depend on you.

This jaw-dropping shirt is sure to fascinate every onlooker, yourself included. The uniform with inner lining is a pleasure to wear, offering a feel of weight and the strength of command. The shirt is dressed up with embossed silver striping on the shoulders and a Star Trek-style pattern on the torso, to match the design from the Star Trek – Discovery TV Show. Featuring a silver lap, the bright stylish zipper pulls to the chin. The 3-D icon pin, rich with detail, completes the costume.

Lead your shore party to the nearest fan expo or game con as you meet strange cultures and risk the chance of being abandoned on the surface by a dangerously unbalanced captain. Add a phaser or better still, a tricorder to take readings of whatever you find. Any planet surface is dangerous; be sure to prepare yourself for whatever happens.

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A 57-Year-Old Star Trek Mystery Has Finally Been Solved

• Nearly 60 years ago, Star Trek: The Original Series introduced the Mirror Universe.
• Star Trek: Discovery returned to that parallel dimension in Season 1, showing audiences more of that world.
• In the final season of Star Trek: Discovery, the fate of a key vessel in the mirror universe is revealed.

The following contains spoilers from Star Trek: Discovery , Season 5, Episode 5, "Mirrors," now streaming on Paramount+ .

One of the most interesting concepts in the Star Trek mythology is its "mirror universe," a parallel dimension where almost everyone is evil. Of the universe's dozen series, only four ever explored it, and only two did so more than once. Star Trek: Discovery made the mirror universe key to its first season, and in its final one, the series revealed what happened to the ISS Enterprise 57 years after it was first introduced. When the show first debuted, some long-time fans felt the crew and the captain were not in keeping with the tenor of proper Starfleet officers. However, Season 1 revealed Captain Lorca hailed from that universe , explaining why he seemed more "evil" than the typical starship captain.

Once the USS Discovery traveled through a wormhole to the 32nd Century, Dr. Kovich told Dr. Culber that the Mirror Universe and Prime Universe were too far apart for "crossings" to occur any longer. However, while on the hunt for the clues to the location of the Progenitors' technology, Captain Burnham and Cleveland "Book" Booker find a pocket of interdimensional space housing a vessel from the Mirror Universe. However, it's not any old starship, it is the ISS Enterprise last seen in "Mirror, Mirror" when the Prime Universe's Captain Kirk told Mirror Universe Spock it only took one good man to start a revolution. Once Star Trek: Deep Space Nine reintroduced the Mirror Universe, what happened to the ship was an open question Discovery just answered.

Where the Mirror Universe and the ISS Enterprise Came From

Star trek: discovery's mary wiseman, wilson cruz and blu del barrio hype finale.

When Gene Roddenberry put together his pitch for Star Trek 60 years ago in 1964, a loose idea of the Mirror Universe concept was on an early pitch document . The full concept came from writer Jerome Bixby, based on his decade-old short story "One Way Street." The writer said "the universe [he] created was a very savage counterpart" and that "it's arguable...the universe itself might be termed a 'character,'" in The Captain's Logs Supplemental by Edward Gross and Mark A. Altman.

In "Mirror, Mirror," Kirk, Doctor McCoy, Uhura and Scotty are sent via transporter accident to the Mirror Universe. The episode is mostly about them trying to survive long enough to be returned to their own universe. However, Mirror Spock figures out the captain and crew aren't from his version of reality. So, he ends up helping them recreate the accident so they can return home. Tiberius Kirk and the evil versions of the crew are also sent back, but it's strongly implied that Spock will quickly take control from him.

In Star Trek: Enterprise , a two-part episode set in the Mirror Universe brought the USS Defiant from The Original Series episode "The Tholian Web" to the past. This helps explain why the ISS Enterprise is so much like the Constitution class vessels from the prime universe. Each starship is also equipped with a Tantalus Field, a mysterious device that makes a captain's enemies vanish. Presumably, Spock used the vessel to start his revolution, and Deep Space Nine reveals how it all turned out. Yet, what happened to the ISS Enterprise remained a mystery, until "Mirrors."

The USS Discovery's Search for Clues Led Burnham to the Enterprise

Star trek: discovery's alex kurtzman & michelle paradise talk final season.

Captain Burnham and the USS Discovery crew are familiar with the USS Enterprise, though Captain Christopher Pike was her commanding officer then. After surviving the Time Bug placed on the ship by Moll, Burnham and Book take a shuttle into an "aperture" of extradimensional space to follow their ship's warp trail. When they enter it, Burnham recognizes the ship, but tells Book that during her time in the Mirror Universe in Season 1, she never saw that particular vessel. The ship has been stuck there for some time, and it's damaged. Not just from the pocket dimension it sits in, but it had been in a battle.

When Burnham and Book board the vessel, they discover something surprising. Rather than a Terran warship, they see the ISS Enterprise seemingly serving as a home to refugees . After restoring some power to the ship, they are able to locate Moll, L'ak and the clue they seek by scanning for the quantum signature of people and objects from the prime universe. A short fight breaks out, but circumstances align so that Moll and Booker have to work together to free L'ak and Michael from a security protocol.

When L'ak and Michael fight, she's able to get the clue and she, accidentally, wounds the Breen exile. Moll and L'ak escape in the shuttle Michael and Book arrived on, so they have to figure out a way to get the ISS Enterprise out of the extradimensional space it was marooned in so long ago. Naturally, they succeed with the help of quick-thinking by Commander Rayner on the USS Discovery. What's most interesting, however, is that throughout this adventure no one really wonders just how the clue from the Prime Universe ended up on the flagship of the Terran Empire.

Deep Space Nine Revealed the Fate of Spock's Terran Empire

Star trek: discovery actors doug jones & david ajala prepare for their last adventure.

The first show to return to the Mirror Universe was the first serialized Star Trek , Deep Space Nine in Season 2, Episode 23, "Crossover." Naturally, because that series was set on the space station close to the planet Bajor, this was the corner of the Mirror Universe that the episode (and its many sequels over seven seasons) explored. Rather than the jingoistic rules of the Terran Empire, however, humans were an oppressed class working the ore processing facilities on the Deep Space 9 station. It was ruled by an alliance of Klingons, Cardassians and Bajorans.

Kira Nerys met her counterpart, the leader of the station known as "the Intendant." She explained to her what happened after the real Captain Kirk transported back to his universe. Spock used the ISS Enterprise to become Chancellor of the former Empire, all the while making institutional reformations that made the society more peaceful and equitable. However, after years of being oppressed by the Terrans, the Klingon and Cardassian alliance was able to launch a successful campaign against them.

Still, Deep Space Nine left the ultimate fate of the Terran Empire -- and, more specifically, the ISS Enterprise -- an open question . In fact, Intendant Kira never really clarified when the Terran Empire fell, beyond saying that Spock's reforms began "almost a century ago." Still, knowing that the Terran Empire fell under a brutal assault by Klingons and Cardassians , a picture starts to emerge about why the ISS Enterprise would have been a home for refugees and made the perilous, impossible journey across dimensions.

A Terran Refugee Hid the Clue In the ISS Enterprise In the 24th Century

Star trek: discovery's sonequa martin-green embarks on one final voyage.

At the end of "Mirrors," Michael Burnham reveals the scientist who hid the clue on the ISS Enterprise was able to do so because she was, herself, a Terran . Some time before The Next Generation's "The Chase," she and a group of refugees fled the ISS Enterprise in shuttles and made their way into the Prime Universe. From there, many of them made homes in the Federation, and this particular scientist was the Junior Science Officer on the ISS Enterprise, Dr. Cho.

This means the Terran refugees fled the Mirror Universe sometime before the events of "The Chase." Yet, it was close enough to those events that Dr. Cho was able to make her way back to the ship that carried her and her fellow immigrant in order to hide the clue there. As Booker notes in the episode, the clues to the Progenitors' technology each come with a lesson. In this case, Dr. Cho wanted to subtly teach the searchers who followed her that things can always get better. She went from being a Terran scientist to a Branch Admiral in Starfleet. It's kind of like Starfleet's first mutineer becoming the captain of the first vessel on which she served afterward.

No matter the timeline or universe, the Enterprise is an important, historic vessel. The ISS Enterprise was a warship that brought fear and terror to whomever it visited. At least, until a man named Kirk told a man named Spock there was a better choice to make. In its final season, Star Trek: Discovery has found yet another way to tie its story into the fabric of the universe's past and the message Gene Roddenberry and all those who followed him wanted to give the audience. Things can always be better, but it takes people making the right choices to get there.

Star Trek: Discovery debuts new episodes Thursdays on Paramount+.

Star Trek: Discovery

Release Date September 24, 2017

Cast Oyin Oladejo, Emily Coutts, Anthony Rapp, Sonequa Martin-Green, Doug Jones, Mary Wiseman

Main Genre Sci-Fi

Genres Drama, Sci-Fi, Action, Adventure

Rating TV-14

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Published Apr 26, 2024

RECAP | Star Trek: Discovery 505 - 'Mirrors'

No matter how bad things get, the one thing you always have is a choice.

SPOILER WARNING: This article contains story details and plot points for Star Trek: Discovery.

StarTrek.com

Previously, in " Face the Strange ," Moll and L'ak unleash a time bug aboard the U.S.S. Discovery, designed to paralyze them and keep them stuck as they're randomly cycled through time. Once they're ahead of Discovery and on to the next clue, they can escape the bounty on their heads and finally be free.

In one time loop, Zora informs Burnham and Rayner one of the outcomes they feared had come to pass — the Breen gained control of the Progenitors' tech and destroyed everything, leading the Kellerun to believe the Breen must be the ex-courier's highest bidder. Thankfully for the crew, they're back in the mix and only lost six hours. Plus, they discovered a warp signature matching Moll and L'ak.

In Episode 5 of Star Trek: Discovery , " Mirrors ," Captain Burnham and Book journey into extra-dimensional space in search of the next clue to the location of the Progenitors' power. Meanwhile, Rayner navigates his first mission in command of the U.S.S. Discovery , and Culber opens up to Tilly.

• Cleveland "Book" Booker
• Michael Burnham
• Paul Stamets
• Sylvia Tilly
• William Christopher
• Dr. Hugh Culber
• Moll (Malinne Ravel)
• Breen Primarch

• U.S.S. Discovery -A
• Discovery shuttle
• I.S.S. Enterprise
• Breen warship

In his quarters aboard the U.S.S. Discovery -A, Cleveland "Book" Booker contemplates advice given to him by his mentor and namesake, "No matter how bad things get, the one thing you always have is a choice." Book gazes at a holo of Moll — real name Malinne Ravel, the daughter of his predecessor — certain that she is capable of turning things around just as he had. Aware that Cleveland Booker IV saved his life, Book believes he owes it to him to do the same for his daughter.

With Discovery at Moll and La'k’s last known coordinates, Book makes his way to the Bridge, where Captain Michael Burnham gives the stage to Commander Paul Stamets and Lieutenant Sylvia Tilly. Though it appeared as if the couriers' ship left a warp trail which disappeared into empty space, adjusting the viewscreen to compensate for the Lorentzian coefficient in high-energy spectra reveals the presence of a fluctuating wormhole. Stamets states that it leads to a pocket of interdimensional space and is collapsing and expanding due to matter-antimatter chain reactions, likely caused by the Burn.

Captain Burnham surmises that the next clue resides within the wormhole, and Tilly notes that Moll and L'ak are probably in there, as well. Lieutenant Gallo, Commander Rayner, and Lieutenant Christopher brief the captain — sensors can’t penetrate the aperture, the opening isn’t large enough to fit Discovery’s saucer, and there’s no guarantee that they’ll be able to maintain comms contact. Burnham nods, ordering Lieutenant Linus to prepare a shuttle with boosted comms and fortified shields before requesting that Lt. Commander Gen Rhys place a security team on standby.

"Mirrors"

The captain's declaration that she will accompany Book on the away team draws Rayner's interest, and the two senior officers convene in the Ready Room. The Kellerun first officer expresses his view that he should be the one risking his life to lead the mission. She assures Rayner that she needs him on the ship and refuses to bring additional security with her, citing that the implied threat of armed guards would undermine Book's personal connection to Moll. Recalling the devastating future they had witnessed during the time bug ordeal, Rayner observes that it was only one possible outcome.

Captain Burnham senses there is more to Rayner’s unease and quotes the Ballad of Krul , " Serve it without a grum of osikod ." Though impressed by his captain's reference to Kellerun culture, Rayner still holds back. Burnham theorizes that his concern is related to taking the conn while she's away, and he begrudgingly admits it has been some time since he took the chair from another captain. The first officer makes eye contact, confessing that he doesn’t want his tenuous rapport with the crew to jeopardize the mission. Burnham reassures Rayner that she believes in him, leaving the demoted captain to swallow his protest.

Book joins Burnham to embark on their journey and pilots their shuttle away from Discovery . Relaxation floods the former courier's expression as he notes the craft is "purring like Grudge when she’s killed something." Hoping to emphasize his connection to Moll's father in the event they locate her, Book playfully shifts the conversation to the captain's temporal escapades when the time bug overtook the ship. Burnham makes a "my lips are sealed" gesture, only willing to disclose that she encountered some surprises.

The shuttle approaches the aperture, and Book plans to charge the impulse capacitance cells and release them into the drive coils to give the vessel a boost. Book offers a saying from his own culture, Never return from a hunt without enough bait for the Carrion Reaver . Burnham laughs off the "catchy" phrase, and the shuttle launches toward the wormhole's pulsating light. Turbulence causes the ship to tremble, and a bright flash overwhelms the two occupants.

Commander Rayner observes from the Bridge and is initially greeted by static. Burnham's voice cuts through the interference, informing the first officer that they made it through. Rayner’s relief is short-lived, as Discovery loses the shuttle's comm signal. He orders Stamets to the Science Lab in a bid to boost comms and conveys confidence as he takes the ship to Yellow Alert.

Meanwhile, in the wormhole, exotic matter has rendered the shuttle's sensors and holopadds inoperative. Book and Burnham narrowly dodge debris — "debris is not a good sign" — and spot the smoldering wreckage of Moll and L'ak's ship, or at least half of it. The nebulous environment clouds their vision, and Book wonders if the couriers survived. Burnham stands as she spots another vessel through the murkiness, its I.S.S. markings indicating it originated in the Mirror Universe. Shock envelops the captain's face as she reads its full designation — I.S.S. Enterprise* — and postulates that how the vessel arrived in interdimensional space must be "one heck of a story."

Book sees the Constitution -class starship's battered hull as evidence that it became trapped during a battle, and Burnham declares that it must have been ages ago — crossing from the Mirror Universe has been impossible for centuries. A shipwreck in a hidden wormhole sounds like a secure place to hide the next clue, though the captain is only acquainted with her brother Spock's U.S.S. Enterprise . They glimpse the other half of Moll and L'ak's broken vessel and assume that, if the couriers are alive, they must be on the Terran ship.

Back on Discovery , Tilly tracks an EPS conduit to a panel in Sickbay — after having followed it across three decks, including through the quarters of a new ensign who keeps a Cardassian vole as a pet. Sensing that Dr. Hugh Culber feels troubled, Tilly lets him know that she's always available to talk — at least until Stamets chimes in over the comm system to check on the status of her work. Culber maintains that he is fine and promises to find Tilly later, though his demeanor leaves her unconvinced.

In the Science Lab, Stamets notices that Ensign Adira Tal is undergoing some uncertainty of their own while working on their graviton pulse idea. The ensign rechecks their calculations for a third time, prompting the astromycologist to tell them that the time bug was not their fault. Rayner strolls in with confidence and requests an update on attempts to boost the comm signal. Stamets begins to explain, but the commander interrupts and states that he does not need to know how the cake is boiled. Adira is taken aback by the Kellerun culinary insight — Rayner assures them not to knock it until they try it — but Stamets presses forward with a proposal to hold the interdimensional aperture open. Unfortunately, there's a 43.7% chance that a graviton pulse would cause the aperture to close with the captain and Book still inside. Visibly frustrated, the first officer urges them to get the comm signal back.

Phasers drawn, Captain Burnham and Book enter the I.S.S. Enterprise 's bridge, which is adorned with Terran insignia and dimly illuminated by flickering lights and control panels. Intent on using the ship's sensors to track quantum signatures from the Prime Universe in order to locate Moll, L'ak, and the clue, Burnham pauses when she realizes that Book is standing at the science station — her brother's station, at least on the U.S.S. Enterprise . Though she had never met Spock's Mirror counterpart, she assumes he was just as ruthless as the Terrans.

Using a hack Book had previously applied on an Andorian transport ship, the captain successfully accesses the Enterprise 's sensors, and — after the former courier elicits words of praise from her — they detect that the intermix chamber has been ejected from the warp drive, all shuttles and escape pods are gone, the captain's log was erased, and the crew had apparently abandoned ship. Evacuation is a last resort in Terran culture, but the starship's damage was not terminal. The situation leaves them puzzled, but they turn their attention to the three Prime quantum signatures located in Sickbay — Moll, L'ak, and the clue.

En route to their quarry, Burnham and Book spy bedding, blankets, clothes, and other objects one wouldn't expect to find on a warship strewn about in the transporter room. Book gets a glimpse of the I.S.S. Enterprise 's dedication plaque, which itself bears an unorthodox phrase for Terrans, " Light of hope shines through even the darkest of nights. " The inscription describes the starship’s story, and Book relays that the new Terran High Chancellor had been killed while trying to make reforms. The crew mutinied, escaped, and attempted to shuttle refugees from the Mirror Universe into the Prime Universe, and a Kelpien slave-turned-rebel leader helped them. As she listens to the tale, Burnham picks up a locket and places a piece of her uniform inside of it. The mention of the Kelpien — likely Mirror Saru — catches her attention, and she supposes the crew fled when the ship got stuck within the aperture.

The pair continue on and move through the Terran ship's sparking corridors, only to be confronted by a batch of Moll and L'ak holo-doubles whose phasers are pointed toward Sickbay's entrance. Unable to determine which Moll and L'ak figures are real or target the room's holo emitter from their location, Book and Burnham rush their opponents and dodge a storm of phaser fire. They take out several holographic doubles before striking Sickbay's emitter, and the two couriers' true forms are revealed. Everyone heads for cover, but Burnham's diplomatic appeals don’t sway Moll or L'ak.

Book steps out from his concealed position. The captain follows with her phaser up, but Book tries to relate to Moll via their shared connection with her father. Moll grimaces with pain and anger as she states that Cleveland Booker IV was garbage, and L'ak holds up their bargaining chip — a device containing the next clue. Moll pitches a compromise; if she and L'ak are given a ride out of interdimensional space, they’ll let Starfleet replicate the clue. Burnham counters, bluntly replying that the couriers don’t have the clue. Referring to the decoy stanzas on Lyrek, the captain displays the locket she had procured and notes it has a Prime quantum signature.

The standoff remains steadfast, and Book draws Moll's ire when he guesses the couriers would not risk each other's lives over latinum. The exchange intensifies, and Moll contests that not even the Federation could lift an Erigah . Burnham recognizes the term, stunned to learn that the mysterious L'ak is actually Breen. An Erigah is a Breen blood bounty, and Moll and L'ak clearly hope to exchange whatever is at the end of the clue trail for their freedom. Book questions Moll about what they did to receive such a sentence, and the courier reflects…

…back to one of her regular visits to a busy Breen space station some years ago, where two helmeted Breen investigated one of her deliveries. Moll is unafraid when a third Breen approaches, introducing herself by quipping that she enjoys latinum and long walks on the beach. The Breen responds through his helmet's metallic speech processor, but rather than using the Breen sounds deemed unintelligible by most species, he speaks to Moll in her own language and accuses her of cutting her dilithium shipments with impurities. The human denies the accusation levied by "Green Eye," and the two square off in hand-to-hand combat.

Moll's lighthearted conversation persists even as they fight, and she points out that the Breen's belt insignia indicates he is royalty. Rumors have swirled that the Primarch's nephew — an independent thinker named L'ak — has been demoted to shuttlebay duty. Moll suggests that she can help L'ak get payback and admits she does cut the dilithium, leading the Breen to place her in handcuffs. Moll never relents, pitching that having a partner on the inside would make her operation go smoother. She senses L'ak is intrigued and faces him — she knows what it's like to be on the outside and alone — before slipping out of the cuffs. L'ak ponders why Moll would make a deal with someone she didn't know anything about, and Moll resolves to change that unfamiliarity.

Back in the present, Moll refuses to disclose what she and L'ak did to receive their bounty. Captain Burnham cautions them to not let love lead them down the wrong road, but Moll and L'ak opt to open fire once again. An errant phaser blast strikes a control panel, raising a containment field that traps Burnham and L'ak in Sickbay while preventing Book and Moll from re-entering the room. Book intends to resolve the dilemma with the Bridge's security controls and requests Moll's assistance. She agrees to the temporary truce, but threatens to dust Book if he makes one wrong move. They depart, but L'ak and Burnham stay put and keep their weapons drawn.

In another memory from their time on the Breen space station, L'ak receives payment from Moll and declares that her dilithium is clean. She quietly asks if he’d like to inspect her ship again to make sure she didn’t smuggle any tribbles on board, but L'ak's needs to shine his boots in anticipation of his uncle's upcoming inspection. The Breen clarifies that this isn't a euphemism, as the Primarch really likes their boots to be shiny. Moll thinks his uncle sounds like an asshole and brings up the promise that "Green Eye" had made during her last visit. L'ak delays, but Moll is adamant that he show her what he looks like. Though she has seen his face, she wishes to view his other face. L'ak seems self-conscious, and Moll maintains that both faces are a part of him. L'ak concedes, holding his breath and retracting his helmet to reveal his translucent green features. Moll greets him with warmth…

...however, aboard the Enterprise , Moll's demeanor is icy. She walks defiantly through the ship's corridors and rejects Book's appeals about her father. Aware that Cleveland Booker IV left Moll and her mother, Book shares that his mentor made the difficult choice to stay away from them in order to keep them safe. Moll emits a strained laugh, believing that Book must have his own "daddy issues" to have believed her father's story. Even though her father had promised to get his family off of Callor V and take them to a safe-haven colony in the Gamma Quadrant, he eventually just stopped coming home. Her mother was forced to get a job in the rubindium mines, ultimately falling victim to the harsh conditions when Moll was 14. Left alone, Moll tearfully emphasizes that L'ak is now the only person who matters to her.

Down in Sickbay, L'ak and Burnham retain their suspicious stares. Seated, yet still aiming their phasers at each other, they discuss the "power beyond all comprehension" that the Romulan scientist's diary and the subsequent clues would guide them toward. The captain warns L'ak what could happen if they Breen acquired that technology, and her observation that the Federation is all about second chances seems to resonate with him. Though Burnham promises she'd advocate for Moll and L'ak to serve their time together, L'ak is emphatic — he'd rather die than be separated from Moll.

On the Enterprise 's Bridge, the security system's firewall prevents Moll and Book from accessing the containment field. Moll pounds the console in frustration, but Book takes the opportunity to compare Moll and L'ak’s bond with the one he had shared with Burnham. With the exception of Grudge, who bites him when he doesn't feed her, Michael was the first friend Book made after Cleveland Booker IV died. He apologizes for what Moll endured because of her father and explains his troubled relationship with his own father, though Moll's thoughts continue to drift to L'ak…

…and to their time on the Breen space station. Concealed by a force field among the cargo containers, Moll and L'ak kiss. The human pauses, hesitant to mention that she received a new contract in Emerald Chain territory. L'ak calls Osyraa a butcher, but Moll responds that the Breen Imperium's faction wars don't make this region much safer. Her pursuit of higher paydays is a byproduct of her desire to discover the peace and freedom of the Gamma Quadrant paradise that her father had described. L'ak confesses that he only stays in Breen space because he has nowhere else to go, prompting Moll to propose he leave with her. The sound of footsteps interrupts the tender moment, and the Breen Primarch marches in with two Breen soldiers by his side. He disables the privacy field, his visored face locking eyes with the human.

With the memory of that confrontation fresh in her mind, Moll comes to attention on the Enterprise 's Bridge and knocks open a panel underneath the con. She creates a power surge to burn through the security system and short out the containment field, but her actions cause violent explosions to rock the ship. The Sickbay force field drops, though Burnham’s attempt to block L'ak's exit results in another round of fisticuffs that shatters glass and takes its toll. Book reports that impulse engines are overloaded and nav systems are fried — they have no control over the ship. Discovery 's shuttle becomes dislodged, tumbling away from the Terran ship and leaving the Enterprise eight minutes from impacting the aperture.

Book tries to develop a plan, but Moll aims her phaser at him. Nevertheless, Book is still determined to not let anything happen to Burnham or Moll. As a Kwejian, he lost his planet — everything that he cared about is gone. Though Cleveland was a "shit dad" to Moll, he was a great mentor to Book. In a heartbreaking tone, Book informs Moll that she is the only family he has left. He carefully picks up his phaser but chooses to hand it to her. She reacts with suspicion and directs both weapons toward him. Moll wrestles with indecision but opts not to kill him, a choice which elicits a sigh of relief from Book.

Burnham and L'ak's physical confrontation rages in Sickbay, but the Breen's reliance on a bladed weapon proves to be a tactical error. The Starfleet officer subdues him and retrieves the clue — the locket was a decoy. However, L'ak was inadvertently stabbed with his own blade during the attack. Moll runs in at this unfortunate moment, filled with concern for her partner and rejecting Burnham's plea to get L'ak to Discovery for treatment. Now a mere five minutes from colliding with the aperture, Book and Burnham speed off to the Bridge, leaving Moll to assist L'ak in Sickbay…

…and remember the moment when the Breen Primarch caught them together. As a guard holds L'ak, a second Breen strikes Moll. The Primarch prevents his nephew from intervening, then airs his grievance — L'ak carries the genetic code of the Yod-Thot, they who rule . While the Primarch campaigns for the throne of the Imperium, L'ak has been consorting with "lesser beings." His uncle describes L'ak's use of his more humanoid face as an insult to his heritage. The Primarch retracts his own helmet, gesturing to his translucent visage and proclaiming, " This is Breen." L'ak argues that their ability to change is a sign that both faces are a part of them, but his uncle claims they have evolved past a need for that form — holding it makes L'ak unfocused, inflexible, and weak.

The Primarch reseals his helmet and hands L'ak a weapon. His nephew must kill Moll to gain redemption. Resigned to her death, Moll tells "Green Eye" that their relationship was fun while it lasted, but L'ak elects to shoot the Breen guards instead of her. His uncle allows L'ak to place the phaser at his chest. Swayed by the fact that the Primarch raised him, L'ak only wounds his uncle. Alarms blare through the cargo area, and L'ak urges Moll to flee so that he will know she's safe. The blood bounty that L'ak just earned does not dissuade Moll from wanting him to join her. Holding onto his face, she says they can be happy together. L'ak voices his love for Moll…

…which snaps her back to the present, where L'ak reiterates his love for Moll in the Enterprise 's chaotic Sickbay. However, she is unwilling to give up and vows to get them out of this predicament. Meanwhile, Burnham and Book burst onto the Bridge and intend to activate a tractor beam. Book brightens the Terran light panels — "can’t save the day if we can’t see" — and winks at the captain as he takes the helm.

On Discovery 's Bridge, Commander Rayner asks Christopher for an update on comms. Naya interjects, reporting that something is happening at the aperture. A tractor beam can be seen emanating from within the wormhole, and it is oscillating with a repeating pattern: 3-4-1-4. Rayner grins in understanding and calls Stamets, Adira, and Tilly to the Bridge. The first officer doesn’t just need them to hold the aperture open, he also wants them to make it bigger — large enough for a starship. Discovery isn't going in, but their captain is coming out.

Stamets and the senior staff are perplexed by Rayner's announcement, and the Kellerun's reference to the Ballad of Krul doesn't give them any additional insight. Returning to the task at hand, Tilly affirms that such a procedure would require more energy than the entire ship can safely produce. Rayner pushes them for ideas, promising a cask of Kellerun citrus mash for whoever lands this solution. The Bridge is abuzz with chatter — inverting the deflector array would take too long, discharging the spore reserve would leave them unable to make an emergency jump, and pulling power from gravitational systems would cause everyone to float around… but replacing the photon torpedo payloads with antimatter would add fuel to the reactions already present in the aperture! Adira confirms that hitting it precisely with a sequential hexagonal pattern should keep it open for approximately sixty seconds. Rayner questions why it must be hexagonal, but Stamets points to him in a mischievous manner and notes, "It doesn’t matter. It’ll work." Satisfied, the commander awards the citrus mash to the entire Bridge crew and trusts that they'll make their only chance to succeed count.

As Captain Burnham sits in the I.S.S. Enterprise 's center seat, the ship's computer pronounces that only 60 seconds remain until impact with the aperture. Driven by the perilous countdown, she confesses to Book that he was one of the surprises she encountered while ensnared in the time bug's grip. She reflects on how nice it felt and how happy they seemed. Book offers an appreciative nod, but the pull of the aperture shakes the Enterprise .

On Discovery , Rayner orders a volley of torpedoes to be launched at the wormhole, and their detonations cause the opening to expand and generate even more light. The Enterprise 's tractor beam rattles the ship as it makes contact with Discovery . Book awaits Burnham's order to act and asks if he should "hit it." Captain Christopher Pike's signature phrase draws a quizzical and bemused look from Burnham, who replies, "Feels weird. Let’s just fly." The Terran ship's saucer section begins to emerge from the aperture, and its secondary hull clears it just before it collapses and releases a radiant surge of energy.

A relief-filled Captain Burnham communicates her thanks to Rayner over the comm channel, but she and Book then notify Discovery about a Terran warp pod being fired by the Enterprise . Scans detect two lifesigns and sickbay equipment aboard — Moll and L'ak. The pod launches and jumps to warp before it can be captured, though Rayner hopes to follow their warp signature and put out an alert throughout the fleet.

As the I.S.S. Enterprise and U.S.S. Discovery station themselves opposite one another in deep space, Rayner accompanies Burnham on a stroll through Discovery 's halls and compliments her on her "3-4-1-4" signal. The captain's message had referred to Section 4, Verse 7 of the Ballad of Krul , in which Krul calls to his war brothers for rescue with a repeating drumbeat of three taps, followed by four, one, and four. Although impressed, Rayner has doubts about how the mission played out. Burnham encourages him to take the win and relays that she is ordering Commanders Owosekun and Detmer to head a team and fly the Enterprise back to Federation HQ storage.

Discovery 's crew takes some much-needed downtime in Red's, where Culber follows through on his promise to confide in Tilly. The doctor leans beside her at the bar, and Tilly remarks that the day has left her feeling as if she has been through a gormagander's digestive tract. Highlighting the unique experiences he's had — dying, being resurrected, and staying present in his own body while Jinaal Bix inhabited it during the zhian'tara — Culber can only classify these events as "weird." Coupled with their current quest to find the technology that created life, Culber has found these questions to be both impossible to grasp and exhilarating. Since Stamets hates the unknown, Culber isn't sure how to talk to his partner about these emotions. Tilly advises him that the intellectual and the spiritual are not that far apart in the sense that they each bring understanding and can take you to new places. Initially taken aback by Tilly's use of the word spiritual, the doctor lets his friend's words sink in.

Captain Burnham welcomes Book into her Ready Room as she finishes reading a file on the Progenitors. There's no news about Moll and L'ak's whereabouts, but every ship in the sector is on high alert. She extracts a vial of liquid from the device containing the clue and shares that Stamets is preparing to do a full chemical analysis on it. Burnham secures the third object alongside the other two clues, which Book observes always seem to be presented hand-in-hand with a lesson. The ordeal with the itronok on Trill demonstrated that they valued lifeforms different from their own and the necropolis planet evoked the importance of cultural context, so why did a scientist leave the third clue on a Terran warship? 

The query draws a smile from Burnham, who discloses that the scientist had been a Terran named Dr. Cho — the junior science officer aboard the I.S.S. Enterprise . The captain had Zora search for the names from the vessel's manifest, and most of them had turned up in various Federation databases. The crew did make it to the Prime Universe and started new lives, and Cho herself became a branch admiral in Starfleet. The Terrans had hope, found freedom, and overcame the odds. Burnham supposes that those qualities were the reasons Cho returned to the aperture and concealed the clue on the Enterprise . Perhaps the lesson is that they can shape their future in the same way the Terran refugees had.

Book catches sight of the Enterprise getting underway outside of the Ready Room's viewport, prompting the captain to turn and gaze at the vessel. She brings up the time bug secret she had shared with Book when death appeared imminent, but he grins and acknowledges that they had been happy. Stamets' voice rings out over the comm system to let the captain know he is ready for the vial. Burnham grabs the container and makes her way to the door, but Book wonders what happens when they finally put these clues together. Captain Burnham concedes that she doesn't know, but she can't wait to find out.

* " Mirror, Mirror " — The I.S.S. Enterprise was last seen in this Original Series classic when a transporter malfunction sends the U.S.S. Enterprise crew into a mirror universe.

• Written by Johanna Lee & Carlos Cisco
• Directed by Jen McGowan

"Mirrors" features a dedication:

In loving memory of our friend, Allan "Red" Marceta

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Jay Stobie (he/him) is a freelance writer, author, and consultant who has contributed articles to StarTrek.com, Star Trek Explorer, and Star Trek Magazine, as well as to Star Wars Insider and StarWars.com. Learn more about Jay by visiting JayStobie.com or finding him on Twitter, Instagram, and other social media platforms at @StobiesGalaxy.

Star Trek: Discovery Seasons 1-4 are streaming exclusively on Paramount+ in the U.S., the UK, Canada, Switzerland, South Korea, Latin America, Germany, France, Italy, Australia and Austria. Seasons 2 and 3 also are available on the Pluto TV “Star Trek” channel in Switzerland, Germany and Austria. The series streams on Super Drama in Japan, TVNZ in New Zealand, and SkyShowtime in Spain, Portugal, Poland, The Nordics, The Netherlands, and Central and Eastern Europe and also airs on Cosmote TV in Greece. The series is distributed by Paramount Global Content Distribution.