by Jörg Hillebrand and Bernd Schneider
Many costumes of Star Trek were later modified or even recycled without changes for a different purpose or another civilization. Here are quite a few examples. Please note that every statement made here should be taken with a grain of salt. There is no need to seek for explanations. Certainly we are not supposed to watch closely enough to notice that galactic fashion is not as diverse as it should be.
Finnegan's glittering gray cadet uniform (TOS: "Shore Leave") shows up on Deep Space K-7 too (TOS: "The Trouble with Tribbles"). This certainly isn't a big deal though, as the uniform could be still the same and we can make up reasons why there should be a cadet on that station. The uniform also showed up on Argelius in TOS: "Wolf in the Fold".
The bartenders in TOS: "Court-Martial" and in TOS: "The Trouble with Tribbles" are wearing the same glossy pink jacket (as if it were a uniform).
The security forces of Eminiar VII in TOS: "A Taste of Armageddon" are wearing three different types of caps. At least two of them were re-used. They can be seen on two of the inmates of the mental institution on Elba II in TOS: "Whom Gods Destroy". It is possible that the two are actually Eminiarans.
A part of the Ferengi headgear first seen in TNG: "The Last Outpost" was re-used for the ragtag uniform of the Gatherer Brull in TNG: "The Vengeance Factor".
The following races wear the same blue police or security uniform: the Rutians, the Vulcans, the Mari and the New Sydney authorities. Besides the decoration or rank signs only their emblems are different, and even these are often not original (see Re-Used Props - Badges).
The long-extinct Promellians in TNG: "Booby Trap" have green jumpsuits that should reappear a few episodes later, now worn by the inhabitants of Bre'el IV in TNG: "Déjà Q". Curiously, the recurring race of an extra named Pardshay in DS9, whose make-up is the same as that of the Promellians, is wearing this uniform too!
The Zalkonian military uniform from TNG: "Transfigurations" later appeared in several DS9 episodes. It was worn by a number of Dopterians on the show.
The costumes worn by the miners in TNG: "The Perfect Mate" later show up in a couple of Deep Space 9 episodes. One costume is worn by a crewmember of Kasidy Yates's ship, the Xhosa, in "Family Business" while another can be seen on a Bajoran archaeologist in "Rapture".
The Enaran uniform from VOY: "Remember" reappears as an Annari uniform in VOY: "Nightingale". Even the Annari badge is exactly the same.
Pink tennis shirt
In "The Cage" there is a woman wearing a pink shirt and white miniskirt. Fashion has not changed until the time of TOS: "Where No Man Has Gone Before" where we can once again see a woman with exactly this shirt and presumably the same skirt too.
The Andorian Thelev, actually an Orion in disguise, is wearing a triangular leather or velvet vest in TOS: "Journey to Babel". The same piece of clothing can be seen on a human inmate of the mental institution in TOS: "Whom Gods Destroy".
Harry Mudd was obviously very fond of the dresses that two of his three "love slaves" were wearing in TOS: "Mudd's Women". Two of his many android creations in TOS: "I, Mudd" are clad in identical dresses, namely the Maizie and the Barbara series.
The pink and golden dress that Dr. Wallace is wearing towards the end of TOS: "The Deadly Years" reappears in a recording of the Starnes Expedition in TOS: "And the Children Shall Lead".
The megalomaniac people in the 23rd century have the same taste of grandiose fashion. At least Anton Karidian aka Kodos in TOS: "The Conscience of the King" and Fleet Captain Garth of Izar in TOS: "Whom Gods Destroy" are wearing identical coats.
Esoqq's costume from TNG: "Allegiance" is later worn by DS9's regular barfly Morn.
The very same green/yellow dress with a rose pattern can be seen on several occasions, each time worn by a woman of a different race and for some time in Garak's tailor shop too. This cloth pattern must be the most popular of the galaxy. The oddest appearance of the dress, however, is in VOY: "Prophecy" when Neelix and the Klingon woman Ch'regha leave it on a sofa in Tuvok's quarters after performing a Klingon mating ritual with its usual devastating consequences. We can see both of them step out in their normal clothes (although Neelix is obviously in disorder). So who brought the dress there and who put it on?
The red cape originally worn by Yareena right before her battle with Tasha Yar in TNG: "Code of Honor" can be seen on a woman in the backgroundin TNG: "Captain's Holiday".
Pink metallic jumpsuit
The pink metallic outfit worn by Yareena during the fight in TNG: "Code of Honor" is later seen on an extra in TNG: "Ménage à Troi" and appears on a mannequin in a shop on the promenade in DS9: "Sanctuary".
Jenice Manheim's dress from TNG: "We'll Always Have Paris" is seen again in a clothes shop on DS9's promenade in "Sanctuary", along with the one from "Code of Honor".
Yet another dress that can be seen in DS9: "Sanctuary" previously appeared in TNG: "Déjà Q". In the TNG episode it was worn by one of Q's two scantily clad women. It is the dress that Haneek pointed at in the DS9 episode, but Kira failed to understand that Haneek found it particularly awful.
Another dress appears at least twice. It is worn by one of the two women accompanying the fat Ferengi in TNG: "Unification, Part II" and by the aged Deanna in TNG: "Man of the People".
Tayna's light gray dress from TNG: "A Matter of Perspective" reappears in TNG: "First Contact", here worn by a Malcorian cabinet minister.
Anne Jameson's dress in TNG: "Too Short a Season" appears again in "Ménage à Troi" where it is worn by a Bolian woman.
Kamala's dress from TNG: "The Perfect Mate" later shows up in Garak's tailor's shop in DS9: "Past Prologue".
Suit with silver jacket
Sobi's costume from TNG: "Symbiosis" reappears in TNG: "Ménage à Troi", here worn by a delegate in Ten Forward.
Debin's costume from "The Outrageous Okona" can be seen on another delegate in TNG: "Ménage à Troi".
One delegate in TNG: "Ménage à Troi" wears Kushell's costume from "The Outrageous Okona".
Dark gray suit
The delegate playing chess in the background in TNG: "Ménage à Troi" wears Victor Granger's costume from "Up the Long Ladder".
The costume worn by Steven Miller in TNG: "Haven" is later seen in DS9: "Past Prologue" in Garak's tailor shop on Deep Space 9.
One archeologist in TNG: "Qpid" is seen wearing the same suit as an Angosian government official in TNG: "The Hunted".
One delegate in TNG: "Qpid" wears Reittan Grax's costume from "Ménage à Troi" (and Sovereign Marouk's sash from "The Vengeance Factor").
Dark green gown
Another human delegate in TNG: "Qpid" wears a robe most likely seen on one of the settlers on Tau Cygna V in "The Ensigns of Command". Underneath, he wears the shirt of the Minosian peddler in "The Arsenal of Freedom".
Light green gown
Palor Toff's costume (sans brooch) from TNG: "The Most Toys" is later worn by an unnamed human archaeologist in "Qpid".
Dark blue vest
Ki Mendrossen's costume from TNG: "Sarek" is later worn by a Vulcan archaeologist in "Qpid".
The human and Bolian council member in the second row in TNG: "Qpid" wear Krag and Nel Apgar's costumes respectively from "A Matter of Perspective".
Gamelan V costume
The human female in TNG: "Qpid" wears Chairman Songi's costume from "Final Mission".
The casual outfit Sovak wears in TNG: "Captain's Holiday" appears a few years later in Nog's possession in the DS9 episode "Little Green Men", ironically held by his father Rom, who was played by Max Grodénchik who also portrayed Sovak. The shirt was also for sale in Garak's tailor shop in "Past Prologue".
In TNG: "Dark Page" we can see a silver Wadi dress from DS9: "Move Along Home" in Lwaxana Troi's case.
Re-Used Props - Badges & Jewelry - official badges and emblems, brooches and other jewelry
The Thieves of the Delta Quadrant - re-used props and sets on the Mari homeworld (VOY: "Random Thoughts")