[[Series/StarTrekDeepSpaceNine Main Page]] | '''Tropes A To D''' | StarTrekDeepSpaceNine/TropesEToL | StarTrekDeepSpaceNine/TropesMToP | StarTrekDeepSpaceNine/TropesQToZ | [[YMMV/StarTrekDeepSpaceNine YMMV]]

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[[folder:A]]
* AbortedArc: During the first half of season 7, we learn that [[spoiler:Quark]] is in love with [[spoiler:Ezri]], and it's even hinted the latter might reciprocate. But later on this arc is completely dropped without any resolution, and when [[spoiler:Ezri]] is eventually paired with [[spoiler:Julian]], [[spoiler:Quark]] doesn't comment it at all.
* ActionFilmQuietDramaScene: An entire episode, "The Sound Of Her Voice" is devoted to this, where the crew air out their personal problems while talking to a woman marooned on a deserted planet. This takes place directly before the [[DarkestHour extremely dark and disturbing Season 6 finale]].
* AdultFear: A generous dose can be provided on occasion, particularly in the notorious 'O'Brien must suffer' episodes:
** In 'Hard Time', the level-headed, down-to-earth Chief Engineer O'Brien is {{Mind Rape}}d into experiencing a two-decade prison sentence in a matter of hours, leaving him with a severe case of PTSD that leads to his life gradually falling apart. Eventually, after a domestic dispute in which he almost hits his daughter, he [[DrivenToSuicide walks into an empty cargo hold and places a fully-charged phaser to his head]]. His best friend Dr. Bashir talks him down, but it's a very close-run thing.
** In 'The Assignment', O'Brien's wife Keiko gets a bad case of DemonicPossession from an ancient being called a Pah-Wraith. The Wraith demands he make certain modifications to the station, or it will kill Keiko via a massive stroke... and it's quite happy to cripple her if he starts looking disloyal. Perhaps the creepiest scene in the episode is when the Wraith calls O'Brien to remind him of his rapidly-approaching deadline, whilst combing their daughter's hair ''just'' roughly enough to make its point without raising undue suspicion.
** At one point relatively early in the series, before the Dominion War Arc, when the Feds were trying to maintain peace with Cardassia, Gul Dukat makes a point of discretely boarding the station and entering Sisko's quarters, since as he points out, they used to be his. During his conversation with Sisko he makes an offhand reference to Jake. The rage on Sisko's face is seriously impressive, and immediately he comms Ops and has Odo track down Jake to make sure that he is alright. Dukat makes a big deal of being offended by Sisko's suspicion and demonstrates again that Cardassian military leaders are a little too prone to MySpeciesDothProtestTooMuch. Sisko is most definitely ''not'' reassured that Dukat "would never do anything to harm (his) son."
** In "Time's Orphan", The O'Briens nearly lose their daughter forever twice in the same episode. Once figuratively when she is retrieved from a time portal, aged 10 years and completely feral, and once when they send her back through the portal to leave her there.
* AesopAmnesia: In ''[[Series/StarTrekTheNextGeneration TNG]]'', Worf and Alexander eventually came to the understanding that Alexander should not be forced to be a warrior and Worf could be proud of him anyway. During the Dominion War, Alexander shows up again, and he and his father show the same resentful, misunderstood attitudes towards each other as though they'd never learned that lesson. (With the added bonus of SoapOperaRapidAgingSyndrome [[note]]It's never clearly stated that Klingons ''don't'' age more rapidly than humans, but if they did you'd think it would be explicitly stated at some point given how prominent they are.[[/note]])
** In "Necessary Evil", Kira [[spoiler: reveals that she lied about [[IDidWhatIHadToDo murdering a man on the promenade]] during the occupation, and she and Odo have a heart-wrenching crisis of faith in each other.]] Presumably, they dealt with it [[StatusQuoIsGod between episodes]]. Then a while later in "Things Past", Odo [[spoiler: reveals he was guilty of [[MyGreatestFailure sending three innocent men to a firing squad]] during the occupation...and the two of them have more or less the ''same'' conversation]].
* AGodAmI: Inverted by Weyoun in "Treachery, Faith, and the Great River." When Odo points out that the only reason the Vorta believe the Founders are gods is because they were genetically programmed to believe such, Weyoun says that of course that's true; after all, creating people to worship them is what gods ''do.''
* ASimplePlan: The B-plot of "Treachery, Faith, and the Great River."
* ASharedSuffering: Odo's and Garak's isolation from their respective peoples' ends up forming the [[NotSoDifferent basis of their friendship]] in later seasons when a [[ASharedSuffering common bond]] between them is formed as a result of [[TortureTechnician Garak's]] [[ColdBloodedTorture torture]] of [[TortureAlwaysWorks Odo]].
* AbandonedArea: Empok Nor.
* AbandonShip: Several times, notably in the series intro, which takes place during the [[CurbStompBattle Battle of Wolf 359]] and features the USS ''Saratoga'' in flames as her passengers and crew get to the shuttles to escape. Commander Sisko is forced to leave his wife's body behind.
** Similarly, the titular ship's crew in the episode ''[[spoiler: Valiant]]'' abandon ship in the episode's climax, with the Dominion forces [[SinkTheLifeboats destroying many of the life pods]] (though it's not clear if this was intentional, or just because they were still pummeling the ship into its constituent subatomic particles; in a later episode the Female Founder told her soldiers specifically to let the life pods escape, so that the survivors would spread terror when they retold the story of their defeat.)
-->'''Chief Collins:''' TheCaptain wanted us to-
-->'''Ensign Nog:''' The Captain is ''dead,'' Chief. They're all Dead. [[KnowWhenToFoldEm The ship is lost.]] There's no need for us to die here too.
** And a variation in the Season 5 finale, with the Starfleet personnel abandoning Deep Space Nine, but not because it's in danger of being destroyed, but rather because they can't hold it against the Dominion. The Bajoran militia [[SaltTheEarth destroy the station's computer systems]] as soon as the Starfleet personnel are clear.
--> '''Kira Nerys:''' Dukat wanted the station back? [[CrowningMomentOfAwesome He can have it.]]
** The ''Defiant'' had to be abandoned a couple times as well, notably in "The Search, Part I" (in which Odo and Kira get to a shuttle while Sisko and Bashir get to a separate one off-camera ([[spoiler:though it turns out they actually ''were'' captured and the Alpha Quadrant events of Part II are all taking place in a simulated reality]]); and also in "The Changing Face of Evil", after the ''Defiant'' is hit by the Breen's energy-dampening weapon ([[spoiler:this time, the ship is actually destroyed]]).
--> '''Weyoun''' (''[[FourthWallPsych staring directly into the camera]]''): "[[spoiler:Poor Captain Sisko. I believe he was quite fond of that ship.]]"
* AbhorrentAdmirer: Lwaxana Troi to Odo in their first episode together. After that, [[CharacterDevelopment they became good friends]]. [[CrowningMomentofHeartwarming Odo even married her to protect her unborn child]].
* AbsenceOfEvidence: In "The Nagus", one of the things that tips Odo off that Zek is not dead is the absence of Mairhar'du at his funeral.
* AbusiveParents: When Garak was a child, Tain would lock him in the closet for extended periods of time. As a result, the adult Garak is claustrophobic.
** Dr. Mora used shock treatments on Odo when he was an infant. Odo resented Mora for years afterwards. There's also the matter of Mora and the other scientists naming the young Changeling Odo Ital (from ''odo'ital'', "nothing" in Cardassian) even after they understood that Odo was sentient.
*** Some of this was resolved in the episode ''The Begotten'', where Odo faces the same challenges in attempting to raise a changeling child and reluctantly realizes that Mora's techniques were less abusive than necessary. It's also interesting to note in this episode that Odo and Mora share a similar height, build, eye color, and ''exactly'' the same hair color and style. Odo clearly modeled his appearance on that of Dr. Mora.
* ADateWithRosiePalms: As we learned earlier in an episode of TNG, one of the erogenous zones on Ferengi is the ear, and the stroking of the ear is known as "oo-mox". Doing this to a Ferengi male gives them much the same sensation as stroking a certain other part on a human male does. Ear health is also a lot more important to Ferengi than humans, apparently, since Rom almost ''died'' because of a problem with his ear in "The Bar Association". When his attractive co-worker ([[spoiler: and eventual wife]]) Leeta blames Quark for it because Rom was worked too hard to get regular checkups to prevent things like that, the following conversation takes place.
-->'''Rom:''' It's not Quark's fault that I got sick. I forgot to get my bimonthly ear scan. And besides, I've probably been getting too much oo-mox.
-->'''Leeta:''' Really? Who's the lucky female?
-->'''Rom:''' [sheepishly] No female. Just me.
-->'''Leeta:''' [embarrassed] I'm...sorry...
-->'''Rom:''' [hopeful] Sorry enough to do something about it?
-->[Rom tilts his ear toward Leeta]
** Also, it's indicated that some of the wealthier Ferengi have females (of any species) employed to give them oo-mox in public as a conspicuous display of their prestige, and one episode also has Rom's mother giving him oo-mox as an indication of healthy maternal affection. Oo-mox is a more quasi-sexual show of affection, something like kissing--which doesn't make the metaphor any less blatant, however.
* AffablyEvil: Weyoun and the other Vorta, all by design since they're genetically engineered to be liasons and middle-management.
** Also, Gul Dukat, who cranks both aspects of this trope UpToEleven in a great many episodes. Being affably evil seems to be a common trait of nearly all the Cardassians, but Dukat makes a veritable art of it, simultaneously demonstrating both his seductive charm and his loathsome cruelty to such a degree that one can understand why the Bajorans hated him so much, and yet also how he managed to have torrid adulterous affairs with several not-entirely-unwilling Bajoran mistresses both during the Occupation and in the series itself (producing half-breed illegitimate children with at least two of them of whom we know).
* AffectionateParody: "Our Man Bashir" is, for all intents and purposes, a particularly ridiculous ''Film/JamesBond'' film, only with an actual spy tagging along and [[DeadpanSnarker snarkily]] [[LampshadeHanging lampshading]] all the tropes.
* AFormYouAreComfortableWith: The Prophets are apparently incorporeal, appearing in various guises taken from Sisko's memories. (Although they keep the same forms when dealing with Quark, who baffles them.) The 'hardliner' Prophets resemble people who are hostile to Sisko, like Dukat or Locutus. The more neutral ones look like members of [=DS=]9's crew. And the friendliest look like Sisko's dead wife, his son, and the Bolian who saved Sisko's life at the Battle of Wolf 359, respectively.
** The Pai-Wraiths are fond of this, too.
** The Founders can imitate any alien species perfectly, but they appear mostly as the same basic humanoid shape as Odo, since he cannot perfectly mimic a humanoid facial appearance. They presumably appear this way to the Alpha Quadrant because the only Founder they know is Odo, thus they chose to resemble him.
** Founders that go undercover, however, are quite adept at mimicking features of humans (or whatever race they're impersonating). One Founder that had infiltrated Earth ''deliberately'' took the form of Miles O'Brien, whom Sisko knew was off-world, specifically to [[BadassBoast taunt]] Sisko on their superiority in such matters.
** It's possibly deliberate--since Odo has always expressed an inability to mimic complex humanoid features, but has no such problem with small animals or complex objects--that this "default" form was somehow instinctive to him, or that the Founders even blocked him from looking too "normal," [[spoiler: since part of the point of sending him and the others like him out was to learn about alien species by seeing how they would treat a "changeling."]]
*** Though one episode, where we meet an Odo that's about 200 years older, shows us that he eventually learns how to mimic human faces perfectly.
* AlasPoorVillain: Yes, Weyoun dies several times. But a few of his deaths are very poignant, and very much ARE this trope.
* AlienArtsAreAppreciated: Averted in the case of Cardassian literature, which is hideously boring and repetitive by any human standard.
* AlienLunch: Well, if you want one, there's (lessee) Quark's, a Klingon restaurant, a Bolian restaurant, a jumja stand, and [[TheLastOfTheseIsNotLikeTheOthers Sisko's Creole Kitchen]].
* AllCrimesAreEqual: Episode "Paradise" & the [[PunishmentBox sweat box punishment]].
* [[TheAllegedCar The Alleged Ship]]: The crude fighter Kira and Dax appropriate on one of the moons of Bajor, originally built by the resistance to use against the Cardassians. All manner of things are wrong with it, due to its age and kludgy design, but it ends up being surprisingly spaceworthy, despite Dax's concerns.
--> '''Kira''': You Starfleet types are too dependent on gadgets and gizmos. You lose your natural instincts for survival.
--> '''Dax''': My natural instincts for survival told me not to climb aboard this thing.
* AllJustADream: The Argrathi criminal justice system works this way. Instead of maintaining an expensive prison system, they implant memories of several years of incarceration directly into the minds of offenders over the course of a few hours, who then wake up to find that they haven't lost several years of their lives... but the experience of it felt completely real, and the traumatic memories stay with them... [[spoiler:Miles thought it was a bit of a dick move for them to do that to him.]]
* AllOfThem: From the finale:
--> '''Female Changeling''': I want the Cardassians exterminated.
--> '''Weyoun''': Which ones?
--> '''Female Changeling''': All of them. The entire population.
--> '''Weyoun''': That will take some time.
--> '''Female Changeling''': Then I suggest that you begin at once.
* AlmostKiss: Odo and Lola in "His Way", before Odo decides he just can't do it, because he loves Major Kira and she's not her.
* AlternateUniverse: See also the entry for MirrorUniverse.
* AlwaysChaoticEvil: The Jem'Hadar are genetically engineered to be nothing but loyal Dominion shock troops. The episode ''The Abandoned'' examines this with a Jem'Hadar foundling. Turns out his inherent nature [[spoiler: really does define him: all he wants is to be a Jem'Hadar warrior, even when Odo tries to present other, less violent options.]]
* {{Ambadassador}}: Worf and Curzon Dax.
** AssInAmbassador: See "Move Along Home" and "The Forsaken" for a start.
* AmbiguouslyGay: Virtually every male Ferengi character has hinted at this. From Rom's ability to mimic female walking, to Brunt and Zek's tendency to hide in a "closet," to various male Ferengi's attraction to Quark when he cross-dressed.
** Rule of Acquisition Number 113: Always have sex with the boss. And Ferengi women are supposed to stay at home... Granted, this rule only appeared in the non-canon ''Legends of the Ferengi'' book, but it was written by the executive producers of the show.
*** Canonically, there is a Ferengi book called ''Oo-mox for Fun and Profit''. Oo-mox is a (partially) sexual act, and at the time only Ferengi males were legally allowed to earn profit. Although, knowing the Ferengi, it's entirely possible that the author of said book simply added "and Profit" as an extra advertising incentive- it would hardly be the first case of the Ferengi not presenting an entirely honest title of something.
*** Rule of Acquisition Number 239: Never be afraid to mislabel a product. (Canon, since it appeared in the episode "Body Parts".)
** Quark didn't merely cross-dress, but actually [[GenderBender crossed genders]] to make sure a scheme succeeded. The fact that he was able to change and then ''change back again'' [[EasySexChange using nothing more than some advanced surgery]] suggests the Ferengi have had reason to do something like this before. Maybe this easy trans-sexuality comes from being willing (and able) to do just about ''anything'' to close a deal, which on occasion might have included feminine sexual favors for the customer when there aren't any females available... yet.
** Garak. Toned done after his first appearance because [[ExecutiveMeddling Paramount wasn't a fan of Garak/Bashir shippers.]]
** Mirror Universe Kira. Gay doesn't seem adequate to describe her; nor does bisexual. She seems to consider every man, woman, and object to be a sexual plaything.
*** Nana Visitor indicated that she didn't really agree with the writers about her character's sexuality; the way she saw it, the only woman for whom Intendant Kira really had any attraction was her counterpart, because she loves herself... [[ScrewYourself really,]] ''[[ScrewYourself really]]'' [[ScrewYourself loves herself.]] As for the men, they're all there to service her massive ego as well.
*** Mirror-Ezri and the Intendant seemed to be lovers, though, which would therefore disprove Visitor's theory.
* AndIMustScream: While the audience never gets to see evidence of it, WordOfGod states that [[spoiler: Dukat's ultimate fate is to be sealed in the Fire Caves with the Pah-Wraiths - ''forever.'']]
** [[spoiler: And in this case, WordOfGod is ExactlyWhatItSaysOnTheTin, since it was the Prophet who wears the form of Sisko's biological mother who told him that.]]
** Unless [[spoiler:he gets pulled out of it somehow in the expanded universe.]] Stay tuned.
* AndYouWereThere: "Far Beyond the Stars," "Shadows and Symbols"
* {{Angrish}}: After Damar [[spoiler: kills Ziyal]], he tries to convince Dukat to leave with him. Dukat merely turns to him for a moment and lets out a snarling scream of rage that convinces Damar to back off ''fast''.
* AnimalStereotypes: The Cardassians and Jem'Hadar, both reptiles, are generally cold and vicious. The Bajorans are a much more subtle example. They're said to be evolved from tapirs and their culture places great value on dreams and visions. In JapaneseMythology, tapirs are strongly associated with dreams because they resemble the mythical dream-eating creature known as the Baku (which, incidentally was the name of a completely different race in ''Film/StarTrekInsurrection''.)
* AntiHero: Sisko, at times; Quark, very definitely. Kira when [[PayEvilUntoEvil dealing with]] Cardassians. And Garak, of course. Gul Dukat occasionally tried to be when helping Sisko, but it never took.
* AntiHumanAlliance: In the mirror universe.
* AnyoneCanDie: [[spoiler:Jadzia. Vedek Bareil. Ziyal. Damar. Gowron. Winn. Kor. Weyoun, many times. Dukat, sort of. Even Sisko, sort of.]]
** Although [[spoiler:Damar, Winn, Dukat, and Weyoun's "true" death were]] in the finale. But still.
* ApeShallNeverKillApe: The Founders' number-one rule is that "no Changeling has ever harmed another". [[spoiler: When Odo has to kill one of his own, it takes the Founders a year to decide how to punish him because they don't know how to handle it. Such a thing has never happened before.]]
* ApocalypseHow: Between several extermination attempts by the Dominion against enemy races, to the Federation's own genocidal attempt on the Founders, to the orbital bombardment that would have stripped the Founder homeworld to its core, to the attempted destruction of the Bajor star, to the Pah-Wraiths desire to burn the universe, there's a fair bit of this going on.
* ApocalypticLog: The Klingon commander's log in "Dramatis Personae."
* AppealToInherentNature: The 217th Rule of Acquisition: "You can't free a fish from water."
* ArbitrarySkepticism: Whenever a message is received from the Prophets, everybody treats them like any other religious icon, conveniently forgetting that they have been proved to exist and have the ability to see through time.
** Odo lampshades this in the episode 'The Reckoning', pointing out that Bajoran prophecies have a way of coming true, even it is not in the way people expected (case in point, the episode 'Destiny' from the third season).
** On the flip side, the Bajorans, particularly Kira, often talk about how they have "faith" and wonder how the humans live without it (humans in the Star Trek future generally not being very religious). However, when your "gods" live in a wormhole you can drive ships through, regularly send you accurate prophecies, and even destroy entire fleets of enemy ships to protect your planet, you're not really practicing faith - their deity is practically a scientific law, which calls into question the soundness of the logic underlying Kira's lectures on the subject.
*** The Prophets were never actually met in person until Sisko entered the wormhole; that's what makes him [[MessianicArchetype the Emissary]]. It's true that there were still the Orbs, but before the Prophets were empirically verified to exist, it certainly took faith to believe that an Orb experience is more than just the equivalent of psychedelic drugs.
* ArcWelding: Once Worf joins the cast in Season 4, the Klingon Politics arc from TNG is carried over and, to some extent, merged with the Dominion arc.
* ArcWords:
** "The Dominion" are these for Season 2. They are name dropped repeatedly until the characters and the audience finally learn who they are in the season finale.
** "No Changeling has ever harmed another" are these for Season 3. [[spoiler:This culminates in Odo becoming the first to break this rule]] in the season finale.
* ArsonMurderAndJaywalking:
** Q invokes this trope when talking about how drearily dull Earth has become lately.
--> '''Q:''' Oh don't get me wrong, a thousand years ago it had character. [[RuleOfThree Crusades, Spanish Inquisition, Watergate...]]
** The order changed but Jack in 'Statistical Probabilities" [[spoiler: when talking about Bashir and how he was able to not have his genetic enhancements discovered until the year before]] Jack: "There are rules, don't talk with your mouth full, don't open an airlock when somebody is inside it, and don't [[spoiler: lie about your genetic status!]]"
* ArtEvolution: Oddly [[InvertedTrope inverted]]. Odo's face looks much more human in the first episodes than in later seasons.
* ArtifactOfAttraction: The Sword of Kahless.
** WordOfGod states that the Sword doesn't actually possess any supernatural attraction, it's just that the glory associated with possessing it was too much for even the most honorable Klingon to completely resist.
* ArtifactTitle: A common joke amongst Trek fans is that the characters of [=DS=]9 don't do that much trekking.
* ArtisticLicenseBiology: Actually manages to ''avert'' the old Trek chestnut of casual inter-species conception, at least once: in the season 6 finale, Jadzia and Worf mention to Bashir that they're planning on having a baby. Bashir looks deflated for two reasons: the first is the realization that Jadzia really is out of his reach forever, but the ''second'' is that he realizes that ''he'''s the one they are going to rely on to get Trill and Klingon genetics to play nice together, which he openly says will be really damn unlikely and Jadzia shouldn't get her hopes up.
* ArtisticLicenseEngineering: Well, it *is* Star Trek, but even so, the fact that the airlocks on the station are designed to have both doors open at once is just ridiculous.
** Of course, the station ''was'' built by the Cardassians, and it is established throughout the show that they have lower engineering standards than the Federation. And given how many times the warp cores nearly blow up for what seems like no reason on the various ships of Starfleet, that's saying something.
** ''Civil Defense'': They need to shut down the life support system, so Kira destroys a console with her phaser, as if the life support system was actually located inside the console.
* ArtisticLicenseGunSafety: A minor character in the episode ''Empok Nor'' casually has her rifle pointed at another minor character. When he points this out she protests that the safety is on, making two horrible mistakes at once. First, even with the safety on you ''don't'' point a weapon at someone unless you're actually willing to use it and second, this is an incredibly idiotic piece of information to loudly say while you're on an abandoned station with hostiles somewhere on it.
* AscendedExtra
** Damar - from Dukat's unremarkable [[TheDragon Dragon]] to one of the most crucial components of the later seasons.
*** WordOfGod says that the writers always had "big plans" for Damar, which is how the producers managed to convince Casey Biggs to play such an apparently unremarkable character. In "Return to Grace" (his first appearance) the director shot Damar as if he were a major character.
** Chief O'Brien is an AscendedExtra from TNG, where he played a background character in the pilot, then the transporter chief. He was practically a TNG regular in the second through fourth seasons; he gained both his wife and first child during TNG.
** Rom - Referred to by Quark and Odo in Season 1 as an idiot. Over the course of the show he goes from [[MacGyvering skilled]] [[GeniusDitz wacky repairman]], to station engineer, [[spoiler:to Nagus]]. Quite the transition, no?
* AssumedWin: Grand Nagus Zek's son, Krax, does this in "The Nagus" when Zek is about to announce his successor. But he announces the new Nagus as Quark instead, which outrages everyone sitting at the table. (Quark, for his part, was floored.)
* {{Auction}}: Done in both "Q-Less" and "In the Cards".
* AttemptedRape: Briefly alluded to in "The Forsaken": Sisko tells Bashir that he used to have to shepherd [=VIPs=] around the way Bashir is doing now. This part of his career abruptly ended when he punched one of them out. "It was [[{{Understatement}} a simple misunderstanding]] over his attempt to coax a young ensign to his quarters, against her will."
* AvengersAssemble: "The Magnificent Ferengi", complete with holding up fingers as each new member joins the team to save Moogie.
** That was explicitly a ShoutOut to the film TheMagnificentSeven
* AwLookTheyReallyDoLoveEachOther: No matter how {{Tsundere}} Keiko O'Brien may appear during any given episode, she is devoted to her husband Miles, as he is to her. It is telling that, even given that most seasons have a "Miles Must Suffer" episode, at no time during the series have they seriously considered splitting up.
* AxCrazy: Dukat becomes this for quite awhile after [[spoiler: Ziyal's death]].
** [[spoiler: Mirrorverse Kira]]
** Gul Darhe'el, in the darkest way possible:
--> '''Darhe'el''' [[spoiler: actually Marritza]]: I did what had to be done. My men understood that, and that's why they loved me. I would order them to go out and kill Bajoran scum, and they'd do it! They'd murder them, and they would come back covered in blood, but they felt ''clean''! Now why did they feel that way, Major? Because they ''were'' clean.
[[/folder]]

[[folder:B]]
* BackupTwin: After [[spoiler:the ''Defiant'' is destroyed]], four episodes later a near-identical replacement is ready[[note]]It helps that this is a class of ship, so them having similar design schemes makes sense[[/note]], and they even receive a "special dispensation" to rename it as such from the ''Sao Paulo''. Somewhat justified in that by this point the class was being mass-produced for the war effort.
** Notably, the second ''Defiant'' was seemingly not equipped with a cloaking device (non-canon sources confirm this, though it was not established in the show itself).
** Sisko when he had to assume the identity of his Mirror-self.
** Weyoun got killed five times, and each time ([[spoiler: except in the Finale]]) he is replaced by a new clone.
* BadassCreed: The Jem'Hadar.
--> ''I am (rank and name), and I am dead. As of this moment, we are all dead. We go into battle to reclaim our lives. This, we do gladly, for we are Jem'Hadar. Remember: victory is life.''
** O'Brien has a version we'd all much rather follow:
---> ''I am (rank and name); I'm very much'' alive ''and I intend to'' stay ''that way.''
* TheBadGuyWins: In "Our Man Bashir" in the ShowWithinAShow, this occurs as part of the ProtagonistCenteredMorality Bashir's situation enforced upon him: the people he was determined to keep alive were all in the room with him, while the rest of the Earth and everyone on it were just a holodeck simulation. Solution: do a FaceHeelTurn and push the button that destroys the rest of the world.
** This was subsequently lampshaded by the Bond-style villain (played by Sisko), as he admitted somehow he hadn't really expected to win.
* BaldBlackLeaderGuy: Only completely fulfilled from Season 4 onwards, once Avery Brooks shaved his head.
** Or rather, once the [[ExecutiveMeddling producers]] let him shave his head again.
*** At the time, he was reprising his role as Hawk for several "Spenser For Hire" TV movies. He was constantly growing his hair out and cutting it as he switched between projects. Eventually, he asked the producers of [=DS=]9 if he could just keep the Hawk look.
** Sisko is currently the picture for this trope.
* BaseballEpisode / GameOfNerds: "Take Me Out to the Holosuite". Justified, in that Sisko was shown to be a baseball fan right from the start of the series, and although a war was going on at the episode's time, Deep Space Nine was no longer on the front line.
* BatmanGambit: All over the place, and even Quark pulls off one, albeit seemingly double subverted, in "The House of Quark".
* BattleCouple: Worf and Jadzia -- and, amazingly, also Quark and a Klingon Noblewoman. Kira and Odo as well, although Odo'd really rather she stay out of the fighting, thank you, but is smart enough not to try to make her.
* BeardOfEvil: Lampshaded when Riker's transporter-accident-duplicate from an old TNG episode comes on board [=DS=]9 to steal the Defiant. Of course Riker already has a full beard, but when the reveal is made that this isn't the real Riker we all know and love, he peels his fake sideburns away to reveal that the beard is actually a goatee! It's supposed to be a dramatic moment, as the viewer is given no hints it isn't Riker at that point (though the possibility of him being possessed by an alien or brainwashed or something is always there in Star Trek)... but it comes across as hilarious if you're expecting it.
* BeCarefulWhatYouWishFor: Martok gets hit with this in Once More Unto The Breach, after he finally gets his chance to pay back Kor for blacklisting him so many years ago after Kor is left in command of Martok's ship during a battle against Jem'Hadar, only to become confused and believe he is fighting a battle against the Federation back when he was in his prime. He basically leads the crew (sans Worf) in mocking Kor following the battle for being a senile old fool long past his prime, only to later confide bitterly in Worf that when his chance for payback came, he found he took no pleasure in it.
* BedTrick: Sisko and Mirror!Jadzia.
** Dukat and Kai Winn
* BelligerentSexualTension
** O'Brien and the Cardassian engineer suffer from a cross-cultural misunderstanding because Cardassian courtship is based on this trope and she mistook their arguing as a sign he was sexually attracted to her.
** The show implies this is what Dukat is doing to try and win over Kira. She loathes him and therefore they argue almost constantly, but it only seems to increase his attraction to the extent where he'll do this even at the most inappropriate times such as life-threatening moments. One such occasion led to an in-universe lampshading when Garak lost his patience with Dukat's behaviour and he openly told Dukat off for making a pass at Kira while the station was on an unstoppable self-destruct countdown.
** When Kira moved in with the O'Briens (while carrying their baby), she and the Chief started fighting constantly (mainly over her level of activity and risk-taking while pregnant and him trying to control her). Eventually, they both realize that they are actually VERY attracted to each other, much to their dismay. They both decide that it's a really bad idea and cover up any awkwardness by just letting Keiko think they are back to fighting again. Quark even refers to the pair as "the OTHER O'Briens" while eavesdropping with Bashir on one of their fights.
* BeethovenWasAnAlienSpy: In "The Muse", Onaya says that she unlocked the creativity of many legendary figures from throughout history.
** However she offers no proof of this and may simply be lying to manipulate Jake.
** Played straight in a TimeyWimeyBall, where it turns out Sisko was probably always meant to be Gabriel Bell.
* BefriendingTheEnemy: Sisko tries to make peaceful contact with the Dominion. When the Klingons invade Cardassia, Major Kira has to make peace with Dukat. The man who oppressed Bajor. When Dukat joins with the Dominion, Sisko tries to make peace with the Klingons to counter the Dominion.
* BelatedBackstory: We find out that [[spoiler: Julian Bashir, who had previously been played up as egotistic and a bit naïve, was genetically altered without his knowledge or consent as a young child, that he believes the original Julian died in the hospital because his parents "decided [he] was a failure in the first grade," that he's spent most of his life and the entirety of his career desperately trying to hide his genetically enhanced status to avoid prison or institutionalization, and that he thinks ''freak'' is an acceptable word for what he is,]] ''in season five''.
* BerserkButton: In the "Siege of AR-558," Dr. Bashir treats Vargas, a disgruntled trooper complaining about being stuck in the front lines for an extended period of time, of his illnesses and Vargas eases up a bit. When Bashir tries to change the dressing on his arm, Vargas lashes out, grabbing Bashir's shoulder and pointing a phaser at his throat. Even though he absolutely hated the guy who put the bandages on for talking his ear off, seeing that guy suddenly becoming silent with a hole in the chest gave him psychological trauma, and he kept the bandage on ever since.
%% Please be clear on the criteria for BerserkButton to prevent misuse and shoehorning.
* BetterToDieThanBeKilled: Garak brings this up when he and Worf discover General Martok in a Dominion prison camp, since he supposed Klingons are supposed to kill themselves when they're taken prisoner. Worf and Martok retort that such isn't the case when there are still enemies to fight, or hope of escape.
* BewareTheNiceOnes: The Federation. Unlike the other entries in the franchise where they are portrayed as [[HumansAreDiplomats diplomatic]], ''Deep Space Nine'' routinely shows that just because they favor peace, this doesn't mean that in a crunch [[HumansAreWarriors they can't knock seven bells out of anyone in their path]].
** Observed by Quark in ''The Siege of AR-558'':
-->'''Quark:''' Let me tell you something about Hew-mons, nephew. They're a wonderful, friendly people - as long as their bellies are full and their holosuites are working. But take away their creature comforts...Deprive them of food, sleep, sonic showers...Put their lives in jeopardy over an extended period of time...And those same friendly, intelligent, wonderful people will become as nasty and violent as the most bloodthirsty Klingon. You don't believe me? Looks at those faces, look at their eyes...
** In fact this Star Trek series introduce us the Section 31 (said to rival even Tal Shiar and Obsidian Order) and the captain who is willing to use subterfuge AND murder just to do what is "necessary".
* BeyondTheImpossible: The characters of DS9 are used to a MirrorUniverse where they exist as brutal yet sexy version of themselves, but in the last mirror episode "The Emperor's New Cloak" Quark and Rom witness the death of Vic Fontaine -- despite the fact that Vic is not a real person but a fictional holodeck character in their universe. After trying to puzzle this out for a while, they just give up.
* BigEgoHiddenDepths
* BigFuckingGun: As SFDebris points out, only Sisko could have helped design the ''Defiant''. It's so overpowered that Sisko mentions when he first unveils it in "The Search" that it nearly tore itself apart during shakedowns, and while officially classed as an Escort Vessel, it's really a ''Warship''.
--> '''SFDebris''': "It's a set of guns, strapped to an engine." "Mr. Worf, prepare a high yield torpedo and write on it; don't fuck with the Sisko."
** When the threat of a Dominion invasion becomes imminent, Starfleet upgrades Deep Space Nine, which couldn't defend itself from three Cardassian warships in the pilot, into a station handily capable of holding off a Klingon fleet of more than fifty ships.
* TheBigDamnKiss: Odo and Kira, in front of dozens of people on the Promenade. Also the episode made waves in universe and out...
* BigLittleMan: Invoked. Bashir and O'Brien are just back from a mission [[IncredibleShrinkingMan that involved them being miniaturised]]. They stand at the bar boasting about their exploits, when Quark and Odo both note that a waitress seems oddly tall next to them, sending them scurrying away to check their height in sickbay. The waitress then stands down, off the step she'd been put on by Odo and Quark, revealing the entire thing to be a gag.
* BigNever: Said by Sisko in "Dramatis Personae," after O'Brien suggested all Starfleet personnel to abandon Deep Space Nine.
* BigNo:
** Said by Sisko in "In the Hands of the Prophets" (in SloMo for extra points.)
** Also employed by Odo during the climax of "The Adversary."
** And by Quark in "Who Mourns for Morn."
* BigSecret: "Dax" is a typical example, albeit with an atypical defendant.
** Dr. Bashir's childhood.
* BilingualBonus: When Worf meets Jadzia Dax he says that Curzon Dax was an honored name among Klingons. Jadzia replies in Klingon with something that visibly flusters Worf, [[spoiler: "Yeah, but I'm a lot better looking."]].
* BioAugmentation: [[spoiler: Bashir.]] The 'Jack Pack' in "Statistical Probabilities".
* BittersweetEnding: The finale was this in almost every way, from [[spoiler:the end of the war (thankfully) but with billions of casualties and fatalities, and almost all the main characters being separated from one another]].
* BizarreAlienBiology: When Quark gets badly beaten in one episode, apparently his injuries included his ''lower'' lung being punctured.
** And again in "The Sound Of Her Voice", Odo remarks on the possibility of Morn getting injured and puncturing three or four of his lungs. (And in "Who Mourns For Morn" we find out that his species has two stomachs. And normally has hair, which can fall out as a result of [[spoiler:chronic Latinum poisoning]].)
** The unseen Captain Boday, whose skull is transparent.
** Ensign (later lieutenant) Vilix'pran's reproductive cycle involves budding and requires a hatching pond. Parents of his species must be careful to ensure that their offsprings' wings don't get tangled, as Jake Sisko learned.
* BlackAndGrayMorality: Sisko's tactics capturing the traitor [[spoiler:Eddington]]; also "In The Pale Moonlight."
** And a very rare example for Star Trek: Section 31.
* BlackmailIsSuchAnUglyWord: Averted. In an episode where Sisko threatens to throw Garak off the station and put him in danger of assassination if Garak doesn't help him Garak points out that this is extortion. Sisko has no problem openly admitting it (to Garak anyway).
** Also averted in the pilot, when Sisko blackmails Quark into keeping his bar open by threatening to incarcerate his nephew Nog for a petty crime.
* BlackSpeech: The Breen.
* BlankBook: How Bashir determined he was trapped in Sloan's mind.
* BlatantLies: How Nog and Jake convince Weyoun that they were trying to buy a card for Captain Sisko. By first telling the truth, then telling the most outlandish story possible involving a time-traveling baseball player. [[spoiler: Ironically, this convinces Weyoun that they're such terrible liars they must have been telling the truth the first time.]]
** Garak communicates mostly in these, apparently preferring lies to the truth, and not in some IgnoranceIsBliss kind of way.
--> '''Bashir''': "Of all the stories you told me, which ones were true and which ones weren't?"
--> '''Garak''': "My dear Doctor, they're all true."
--> '''Bashir''': "Even the lies?"
--> '''Garak''': "''Especially'' the lies."
*** Garak seems to live by this old saying: The more truth you mix with a lie, the stronger the lie becomes. And, when you can use it, the truth is the strongest lie of all.
* BlownAcrossTheRoom: Happens to several civilians when the Cardassians attack the station in "Emissary". Also to Quark in "Necessary Evil" when he gets thrown half way across his bar.
* BothSidesHaveAPoint: Dax and Worf's separate reasons for (as it turns out, temporarily) canceling the wedding.
-->'''Quark:''' She says it's because he's a pigheaded, stubborn man who puts tradition before everything else. He says it's because she's a frivolous, emotional woman who refuses to take him or his culture seriously. You can see the problem.
-->'''O'Brien:''' They're both ''right.''
* BottleEpisode: Given that the show had a stricter budget yet more ambitious stories, this is a given. The true achievement, though, is Duet, which cost less than half the cost of an average [=DS=]9 episode, and is considered one of the best told stories of the entire franchise.
* BrainBleach: Bashir needs some after first Quark and Grilka, and then Dax and Worf come in terribly wounded in "Looking for par'mach in all the wrong places". [[spoiler: Fighting is just part of Klingon lovemaking]]
* BreatherEpisode: "In The Cards", "His Way", "Take Me Out to the Holosuite", "Badda-Bing, Badda-Bang"
* BrickJoke: In the pilot episode, Bashir asks Odo where he can practice with his phaser on the Promenade, the joke being that Odo has banned phasers on the Promenade. Years later, in "Way of the Warrior" [[note]] (which because of the retool served essentially as a ''second'' Pilot)[[/note]], when Odo is about to be overwhelmed by Klingons, Bashir and his phaser come to Odo's rescue.
* BriefAccentImitation: O'Brien does a particularly impressive one of Bashir in "The Armageddon Game".
* BuildingOfAdventure: The titular station. Just about big enough to qualify as a CityOfAdventure, too.
* TheBully: Mirror Universe Odo delights in taunting and physically abusing Bashir in "Crossover."
* BullyingADragon: "Profit and Loss". Gul Toran decides to manipulate Garak into doing his dirty work for him (killing the dissident fugitives that are on the station, an act Garak disapproves of) by dangling the carrot of ending Garak's exile in front of him. Once Garak has corralled the dissidents (and Quark who was helping them), Toran intervenes intending to take the sole credit and mocks Garak with the news that Garak's exile will never end and certainly not with any trivial act such as this. Considering Garak was one of the highest ranked agents of the Obsidian Order prior to his exile, which made him one of the most powerful and dangerous men in the whole of Cardassia (and Toran knew this), Toran's attempt to manipulate and then betray Garak was the most foolish, suicidal act of his life. Not only does Garak promptly kill Toran for his audacity, he then helps the dissidents secure their escape and freedom from Cardassia.
* ButForMeItWasTuesday: It's a little loose as Gul Darhe'el is [[CardCarryingVillain genuinely proud of his atrocities]] on Bajor, but he seals the deal with this little gem [[spoiler:(he's actually deliberately [[InvokedTrope invoking it]] and isn't even Gul Darhe'el, but his secretary Marritza)]]:
--> '''Gul Darhe'el:''' "What you call genocide, I call a day's work."
** Martok's utter loathing of Kor stems his influence convincing the board that Martok didn't deserve an officer's commission because he wasn't of "noble blood", a viewpoint seen as rather antiquated in the modern Empire, but passed because Kor's word carried a great deal of weight. When Worf brings this incident up, Kor admits he served as a token member of so many boards and committees, he can't even remember Martok at all!
* ButThouMust: Section 31. The offer to join is merely a courtesy, you really haven't a choice whether you are willing to work with them or not. That means you, Bashir.
[[/folder]]

[[folder:C]]
* CameBackWrong: Weyoun 6, who was considered to be "defective" as he believed the war with the Federation was a mistake and defected. The Vorta are genetically engineered to serve the Founders, however they didn't count on him reinterpreting that directive as also being applicable if he's ''working for Odo''.
** A major part of Weyoun 6's logic was that [[spoiler:the Founders were dying of an apparently incurable disease, and Odo was apparently not infected. Thus, he would soon be all that was left of the Founders]]. Though it turned out that Weyoun 6 was missing some critical information in his analysis.
** Part of Ezri Dax's story arc revolves around the fact that she's had several lifetimes dumped into her head and she was never trained to be a host.
* TheCameo: During the final holodeck scene of the series, many of the production staff are in the crowd, as is every regular actor that wasn't playing a character at the time.
* CannedOrdersOverLoudspeaker: Dukat made prerecorded messages of himself as part of an autonomous counter-insurgency program that would respond to any revolts by the Bajoran workers. He appears to have made a message for [[TheDevTeamThinksOfEverything every possible outcome]].
* CanonForeigner: In "The Sound Of Her voice", have a close look at Quark's. There's an alien hanging around that bears a suspicious similarity to a [[StarWars Twi'lek]].
* TheCaptain: Sisko. Though he was only actually promoted to captain in the third-season finale.
* CaptainObvious: Marritza tells Kira that he was a filing clerk before taking a teaching position at the Academy. When she asks what he taught, he tells her, "Believe it or not, ''filing''."
* CardCarryingVillain: [[spoiler: Subverted with the fake]] Gul Darhe'el. Eventually played straight with Dukat.
* CasanovaWannabe: Bashir hits on everything that moves. And never wins. Although he eventually ends up with Ezri who also informs him that Jadzia would have eventually come around if Worf hadn't shown up first. Apparently, that's also what the writers had intended prior to Michael Dorn's arrival. Some fans feel that Bashir would have been justified in BreakingTheFourthWall for the express purpose of strangling the writing staff and the producers to death.
* CatapultNightmare: Happens to Worf at the start of "Rules of Engagement."
* TheCavalry: Used often. In particular, this seems to be General Martok's very favorite tactic, especially in the sixth season. Whenever the Defiant is in a tight spot, you can bet good money on Martok's ship swooping in to save the day.
* CerebusRetcon: [[spoiler:The reveal about Bashir's genetic enhancements.]]
** The revelation in "Shadows And Symbols" that the Prophets had a ''very'' active hand in [[spoiler: Sisko's birth]] to ensure that he would be able to [[TheChosenOne fulfill the prophecies.]]
* ChampionsOnTheInside: [[spoiler:The ending of the baseball episode.]]
* TheChanteuse: In one episode, Vic makes a holocharacter like this modeled on Kira, for Odo to practice flirting on. [[spoiler: And then swaps her for the real Kira.]]
* CharacterDevelopment: A hallmark of the series, although the most extensive probably happened to BrokenBird {{Tsundere}} Kira Nerys.
* CharacterizationMarchesOn: Odo once deduced Quark was lying to him because Rom was not a good engineer ("He couldn't fix a straw if it was bent"), when in later seasons he is proven to be quite the GeniusDitz.
** They throw in a handwave with a line from Odo when they started to change Rom's character, "I've been watching you, Rom, and you aren't as dumb as you look…"
** Rom's first appearance in a speaking role is ''markedly'' different from his subsequent appearances.
*** He acts more like a typical Ferengi, and is rather aggressive, yelling at Nog while dragging him around the room. It is rather jarring to watch for someone used to seeing his portrayal throughout the rest of the series.
*** Also jarring to anyone familiar with only the later seasons was Rom's attempt to murder Quark in the first season episode ''The Nagus''.
** Granted, that Rom's GeniusDitz capacity as a genius engineer is still played continually straight, even after he joins the engineering crew under O'Brien. His ability is continually underestimated to the end, and he uses it to his advantage. Much of the time the reasoning for the character trait is Quark's own unwillingness to pay for the proper maintenance to be maintained.
* ChefOfIron: We see a Klingon restaurant open up on the Promenade and show up in a few episodes. The chef, a large fellow (even by Klingon standards) also serenades his customers with a violin-like instrument.
* ChewingTheScenery: Hilariously parodied in the case of Doctor Noah, in [[ItMakesSenseInContext the form of Sisko but not played by Sisko]], in "Our Man Bashir".
* ChocolateBaby: The source of most of the dramatic tension for the second half of "Covenant".
* {{Claustrophobia}}: In early seasons, occasional comments about small spaces or needing air suggest that Garak either suffers from it or likes using it as an excuse for his behaviour in certain episodes. It's only in the fifth series that it's revealed he genuinely suffers from this, because of something that happened to him on Tzenketh, years ago. In the seventh season, Ezri finds out Tain used to lock a young Garak in a closet as a punishment for misbehaving and believes that might be a factor in his development of his claustrophobia (he never reveals the Tzenketh incident to her). Since Garak rejects her exploration of that, its true impact on his life is yet another unsolved mystery about his past.
* CoconutSuperpowers: Odo could technically take any shape, but was humanoid most of the time because CG motion control effects were kind of expensive back in the day.
** More than a few of the CGI shape shifting sequences look quite dated at this point.
** One of the spin-off novels has a foreword that notes Odo can be much freer with the use of his ability in print, since there was no need to worry about the effects budget.
* CombatMedic: Dr. Bashir ranks up there with TNG's Beverly Crusher on occasion. He once killed a Jem'Hadar with a stab to the ''neck''.
** He comments on this once, when someone mentions his skill with a phaser. He replies that he wishes it wasn't needed due to him being a medic - but this doesn't stop him from jumping into the fight when the fur really starts to fly.
** Unlike most Starfleet personnel who have inexplicable expertise outside their areas of skill, Bashir is justified as [[spoiler: he is genetically augmented, making him physically and mentally superior to almost any human.]]
** In the pilot episode, Bashir asks Odo if there was a place on the promenade where he could get in some target practice; further justifying this.
* ComicallyMissingThePoint: In "The Way of the Warrior", we get a brief discussion between Dax and Kira, coming out of a holosuite dressed as ladies from [[KingArthur King Arthur's Court.]] Dax is grumbling at Kira for punching out Sir Lancelot. Kira protests that he tried to kiss her, and she was playing a married woman! Apparently she doesn't know Guenevere's story as well as she ought to...
* ComicBookAdaptation: In what was considered a major coup, a small company called Malibu Comics won the rights to publish a DS9 over the more established DCComics (which held the rights to the rest of Trek). That didn't stop Malibu and DC from doing a crossover miniseries with DC's ''Next Generation'' series. Later, MarvelComics obtained the licence, followed by DC (under its Wildstorm imprint), and later still IDW.
* CommandRoster
* CompanionCube: Dr. Bashir's teddy bear, Kukalaka.
** Sisko's baseball.
* CompletelyMissingThePoint: Jake's sincere disbelief that Weyoun is not sending any reports to the Federation that paint the Dominion in an unfavorable light. [[SarcasmMode Since when did totalitarian evil empires start denying the freedom of the press?]]
-->Weyoun: ''Please'' tell me you're [[LampshadeHanging not that naive]].
* ConfessToALesserCrime: When Garak survived an assassination attempt, Odo and Sisko attempted to delve into his past to see if the reason for his exile was related to the attempt on his life. Garak insisted there was no connection because he was in exile for failure to pay his taxes. Although he was right about there being no connection, no-one believed [[BlatantLies the reason he gave]] for being in exile.
* ContinuityNod: Perhaps the funniest example of this trope happens in "Accession", a nod to the fact that in ''TNG'', Worf helped Keiko O'Brien deliver Molly.
--> '''Quark:''' Did you hear? Keiko's gonna have another baby.
--> '''Worf:''' '''''NOW?!'''''
** And later:
--> '''Worf:''' Unfortunately I will be away from the station at that time. ''Far'' away. Visiting my parents. On Earth. Excuse me.
** In "Paradise", O'Brien mentions that his wife Keiko has nicknamed him "the black thumb" for the way every plant he touches seems to wither and die. This is a CallBack to a ''TNG'' episode three years ago.
** In the pilot "Emissary", O'Brien uses some {{Technobabble}} to fool Cardassian sensors into thinking the defenseless wreck of [=DS=]9 has five thousand photon torpedoes. Four years later, when the Klingons attack in "Way of the Warrior", Sisko tells the Klingons he has those same weapons--the Klingons retort that he must be using the same {{Technobabble}} O'Brien used before, but now the station really ''does'' have all those torpedoes.
** In "Tears Of The Prophets," Sisko receives the [[Series/StarTrekTheOriginalSeries Christopher Pike]] Medal Of Honor.
** In "Chrysalis", O'Brien protests to Bashir that he can't break the laws of physics, echoing one of [[Series/StarTrekTheOriginalSeries Mr Scott's]] [[MemeticMutation best-known lines.]]
** In "Little Green Men," just before getting pulled into the past, Nog is reading up on Earth history and notices that Gabriel Bell looks a lot like Sisko.
* ContinuityOverlap: [=DS=]9 has the distinction of being the only ''Franchise/StarTrek'' series to run concurrently with another one during its entire run -- not to mention the first three TNG movies. As a result, it was affected by developments elsewhere in the franchise:
** ''Series/StarTrekTheNextGeneration'': The uneasy relationship between the Federation and the Cardassians is carried over. Races introduced on TNG (Trill, Ferengi, Cardassians, Bajorans) are also heavily featured. The establishment of the Demilitarized Zone in “Journey’s End” also leads directly into [=DS=]9's “The Maquis” and the formation of the titular renegades. Finally, Gorwron is still Chancellor of the Klingon Empire -- something that allows the Klingon politics arc to continue once Worf joins the cast.
** ''Film/StarTrekGenerations'': The TNG combadges, used for the first two seasons, are retired after the Season 2 finale "The Jem'Hadar". Beginning with Season 3, the crew sports the film's updated combadge design. The [[spoiler: destruction of the ''Enterprise''-D]] is later acknowledged when Worf arrives on the station in Season 4.
** ''Film/StarTrekFirstContact'': The original jumpsuit uniforms introduced in "Emissary" are retired after Season 5's "The Ascent". For the remainder of the series, Starfleet officers sport ''First Contact'''s new black and gray uniforms. In addition, starships created for the Battle of Sector 001 also make appearances beginning with Season 5. Finally, the Borg attack is a plot point in Season 5 as Starfleet's losses leave the Federation's navy spread thin [[spoiler: for the Dominion's invasion]].
** ''Film/StarTrekInsurrection'': Despite Picard's best efforts, [[spoiler: at least some of the Son'a don't reconcile with the Ba'ku and are still manufacturing Ketracel White for the Dominion during Season 7]]. The new dress uniforms introduced in the film also appear in Season 7's "Inter Arma Enim Silent Leges".
** ''Series/StarTrekVoyager'': Though [=DS=]9 sets up the Maquis, the overlap is essentially averted due to VOY being cut off from the Alpha Quadrant. However, Tuvok's Mirror Universe counterpart appears in Season 3's "Through the Looking Glass". An Emergency Medical Hologram, along with creator Dr. Lewis Zimmerman, are featured in Season 5's "Doctor Bashir, I Presume". Finally, an ''Intrepd''-class ship and its sets appear in Season 7's "Inter Arma Enim Silent Leges".
*** One episode of Voyager, after they've established contact with the Alpha Quadrant, has B'Elanna Torres reacting poorly to the news that the Maquis have been wiped out by the Dominion, which eventually sends her into a near-suicidal depression.
* CoolGate: Specifically, the stable wormhole between Bajor and the Gamma Quadrant.
* CoolStarship: The ''Defiant'', built as the prototype for the Federation's anti-Borg fleet. Described in the DVD commentary as "on a five-year mission to ''kick ass''." It does. Repeatedly.
** It also has [[spoiler:(at first)]] a cloaking device, illegal under interstellar law for any other Federation starship.
* CourtroomEpisode: "Dax", "Tribunal", "Rules of Engagement".
* CowboyCop: Worf in "Hippocratic Oath." He ruined Odo's investigation, forcing him to just arrest the middleman instead of taking out an entire smuggling business.
** Interestingly, Starfleet believes that Odo himself is a CowboyCop, and makes several minor attempts to reign him in. Despite chafing and complaining about Federation procedure, however, Odo seems to follow it dutifully. In fact, Odo proves to be more loyal to Starfleet than Eddington, the man Starfleet sent to handle station security, as [[spoiler: Eddington joins the Maquis]].
--> '''Odo''': ''"Sir, have you ever reminded Starfleet Command that they stationed Eddington here because they didn't trust me?"''
--> '''Sisko''': ''"No."''
--> '''Odo''': ''"Please do."''
** In the early seasons before his character had been nailed down, writers were just told to think of him as Creator/ClintEastwood. There was some justification as Odo was used to working under a Cardassian system, not a Federation one.
* CrazyCulturalComparison: One episode had a Cardassian scientist repeatedly snipe at Miles O'Brien, expressing [[DiscriminateAndSwitch surprise that he's a good engineer]]. It's later revealed that her sniping is the Cardassian equivalent of ''flirting.''
%% See Awesome/StarTrekDeepSpaceNine, Funny/StarTrekDeepSpaceNine and Heartwarming/StarTrekDeepSpaceNine for various Crowning Moments of Stuff.
* CrazyPrepared: Garak just happens to have a micro-explosive handy with a prepared trigger used by only one species of assassin that would only blow up when he entered his own shop. This was of course handy because the assassin was actually there to kill him, so he pre-emptively blew himself up so the assassin would be caught.
** The Cardassians like this trope in general, from their station security (see TheDevTeamThinksOfEverything) to the Obsidian Order. They have contingency plans for contingency plans with a few [[BatmanGambit Batman Gambits]] thrown in.
* CreateYourOwnVillain: The Federation and the Cardassians bear joint responsibility for the formation of the Maquis rebels following the establishment of the Demilitarized Zone in Season 2.
* Crossover: A loose example with "The Maquis". The duology continues the events of the ''Series/StarTrekTheNextGeneration'' episode "Journey's End", which had aired a month before. It shows what has become of the Demilitarized Zone and the Federation colonists that have chosen to remain on the Cardassian side of the border. One of the Dorvan colonists even appears as an extra in the second installment and Gul Evek also reappears.
* CrystalSpiresAndTogas: The Bajorans prefer their buildings low-rise, but modern Bajor otherwise fits quite nicely.
* CulturalRebel: Nog, who joins Starfleet instead of taking up a business career like most Ferengi men.
** Also, Odo is one of the few Changelings who does ''not'' hate and fear all solids.
* CurbStompBattle: The first open encounter with The Dominion had a Jem'Hadar ship [[RammingAlwaysWorks ramming]] and destroying the ''Odyssey'' [[Series/StarTrekTheNextGeneration (the same class]] as the Enterprise-D) just to prove a point.
** The Second Battle of Chin'Toka resulted in the loss of an entire allied fleet--save one lucky Klingon Bird-of-Prey. Dominion losses amounted to four or five destroyed Breen warships.
* CustomUniform: O'Brien's uniform has shorter sleeves. At the rate that [=DS=]9 is falling into disrepair, can you blame him?
** Justified in O'Brien's case - he's not an officer (full rank and name is either Chief Warrant Officer Miles O'Brien or Senior Chief of Operations Miles O'Brien depending on which source you use).
*** The sleeves aren't actually shorter, he just rolls them up.
** Starting around Season Three, Major Kira eventually trades in her militia uniform for a slinkier one-piece garment.
** Odo's uniform was modified from the standard Bajoran militia uniform, too, with a higher collar and a belt (which he later discarded). Rene Auberjonois liked his Mirror Universe outfit so much, he asked the producers to create a similar one that he could wear on a regular basis.
** Captain Sisko twice wears a variation on the [[Film/StarTrekFirstContact First Contact]] uniform. The tunic, worn untucked, is zipped all the way to the neck, the cuffs lack the division color stripe, and the combadge is placed in the grey shoulders rather than below it. Sources seem to be divided as to whether or not this custom uniform was just a wardrobe mistake.
** When he first arrived, Bashir was wearing the TNG-style uniform, rather than the color-switched ones used in [=DS=]9. (The uniform changes were apparently the whole of Starfleet changing over, but it would have made more sense for this to be shipboard uniform vs. station uniform, particularly as TNG ran another two years and didn't change uniforms.)
*** In one of the [=DS=]9 episodes, officers from starships are seen wearing the TNG outfit, and in TNG s6e15-16 "Birthright," Bashir is on the Enterprise wearing his [=DS=]9 uniform among the other TNG uniforms. Dax was also wearing a TNG uniform in "Emissary" when she and Bashir disembarked from the starship.
*** Becomes an even greater mess when ''Film/StarTrekGenerations'' has both uniforms in use simultaneously on the Enterprise. Finally resolves itself when ''Film/StarTrekFirstContact'' is out, and the uniforms from that movie are then in use for the rest of [=DS=]9, any alpha-quadrant based characters in Voyager (the characters on Voyager itself use the uniforms they had so they don't have to expend energy to replicate the new ones), and the following two TNG movies.
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[[folder:D]]
* DamnYouMuscleMemory: [[GenreSavvy Worf tells an engineering officer in "Starship Down" to change a reconfigured control panel back to the standard layout]] [[InvokedTrope so that this trope doesn't end up causing problems at a critical time.]]
* DarkMessiah: Gul Dukat, as a Pah Wraith emissary.
* DarkerAndEdgier: Even the ''Captain'' is darker, [[{{rimshot}} ba-boom]]. But seriously folks...
** WordOfGod say the sets were intentionally [[TheFutureIsNoir lit differently]] from TNG to make them look less pristine.
* DataCrystal: Isolinear chips.
* DeadpanSnarker: Garak is the show's standout example. Bashir and Odo have their moments too.
** The 100-year-old Bajoran arbiter Els Renora, from the episode "Dax", stands apart as a shining example of this trope, too. Played by Anne Haney (who also played the social worker in ''Mrs. Doubtfire''), she gets some real gems.
--> "I am one hundred years old. I do not have time to squander listening to superfluous language. In short, I intend to be in here until supper, not senility."
--> "But the penalty for these crimes on your world is death, and that is rather permanent."
** But the greatest one of all comes after Tandro's mother announces that she and Curzon were in bed together at the time of the transmission, and thus Curzon ''couldn't'' have been the traitor:
--> "Mr. Tandro, you will want to re-examine your extradition request."
** If only she'd appeared in a few more episodes, she may have even overtaken Garak in this category. As it is, Garak gets the nod based on volume.
** Ziyal has a few shining moments as well, along with what might be her best one-liner in the entire show when she's forced to listen to Quark moaning about how the Dominion take-over will hit his profits.
-->'''Quark:''' "The Jem'Hadar don't eat, don't drink, and they don't have sex. And if that wasn't bad enough, the Founders don't eat and don't drink, and they don't have sex either. Which, between you and me, makes my financial future less than promising."
-->'''Ziyal:''' "It might not be so bad. For all we know the Vorta could be gluttonous, alcoholic sex maniacs."
* DeathIsCheap: The Weyoun clones.
* {{Deconstruction}}: [=DS=]9 liked to do this, both to the rest of Trekdom and other works:
** There are a lot of moments, often involving the Ferengi, which consider Roddenberry's peaceful and non-capitalist vision of the future (of humans) and the potential downsides of it.
** The episode "Valiant" is a deconstruction of the original ''StarWars'' film (aka ''ANewHope'') and derivative works. One tiny ship manned by young, inexperienced but brave heroes runs down the trench of a giant super weapon ship and uses a super torpedo on its WeaksauceWeakness...[[spoiler:only for it to fail, their ship to be blown up and most of them killed]].
** "Far Beyond the Stars" and "Badda-Bing, Badda-Bang" consider the trend in ''Franchise/StarTrek'' to never explicitly mention race or racism (in humans) from the Next Generation onwards, implying it is so distant in the past that it is forgotten. Sisko is shocked when he experiences it in his visions of being a black 1950s science fiction writer, and seems newly aware of the ramifications of his skin colour in the past and becomes angry at PoliticallyCorrectHistory period holo-programmes brushing over it.
** As noted above, the entire series was a rejection of the classic Trek "solve a problem, then fly on and never return" storyline, but "Crossover" was specifically a deconstruction of it. "Mirror, Mirror" ended on a hopeful note, with Mirror Spock deciding to consider Kirk's advice about changing Mirror Federation society. But as we see in "Crossover," this has extremely negative consequences, because all the other warlike societies surrounding the Mirror Federation swoop in and take over, leaving humanity largely enslaved, with very little hope of freedom.
* DefinitelyJustACold: Odo and the Female Changeling after contracting the Founders' disease.
* DeliberateValuesDissonance: A staple of any ''Trek'' series. This one, however, has a much more even-handed approach than the other series, giving a more sympathetic and three-dimensional portrayal of alien values, and showing that the Federation isn't necessarily all it's cracked up to be.
* DemonicPossession: Kira and Jake in "The Reckoning".
** Though in Kira's case it's more willing Angelic possession.
** Keiko is the first to be possessed by the Pah-Wraith.
* DepravedBisexual: Intendant Kira.
* DescriptionCut: In "In Purgatory's Shadow," upon discovering that [[spoiler:Bashir has been replaced by a Changeling and is being held in a Dominion prison camp, Worf and Bashir ponder what mischief the Changeling is up to on the station. The show immediately cuts to Bashir's replacement delivering sandwiches to Dax and O'Brien.]]
** In "Take Me Out to the Holosuite", Ben tells Kasidy the reason why he wants to beat the Vulcan captain's team so badly, and then tells her she's not allowed to tell anyone. He makes her promise. Cut immediately to Kasidy talking to the crew in the wardroom, having just told them: "He made me promise not to say anything, so keep it under your hats."
* DespiteThePlan: the episode "Badda-Bing, Badda-Bang" involved an Ocean's Eleven-style casino heist where nothing went as planned, but everyone bounced back in time to pull it off.
** They actually show us what the perfectly-performed plan looks like, too, and even mislead us a little into thinking it's the actual performance of the plan, with the characters narrating/explaining their parts. This makes the blunder-filled version that much more hilarious. And exciting. (Of course, this is the common inversion of the UnspokenPlanGuarantee: since we hear the plan, you know it won't go that smoothly in practice.)
* {{Determinator}}: Worf, in "By Inferno's Light". He forever earns the respect of General Martok.
--> '''Martok:''' Seven battles, and ''seven'' victories! What hero of legend could have done as well?
--> '''Worf:''' Heroes of legend do not ache so much.
--> ...
--> '''First Ikat'ika:''' I yield! I can not defeat this Klingon. I can only kill him, and that no longer holds my interest.
** A nod to the classic MarvelComics story, except with Worf taking the Ever-Loving Thing's place as the guy who won't stay down against an opponent he can't beat.
** In the same episode, Garak earns the respect of both Worf and General Martok when he defies a debilitating phobia because he knows he's the only person who can get everyone safely out of the internment camp.
-->'''Martok:''' There is no greater enemy than one's own fears.
-->'''Worf:''' It takes a brave man to face them.
* DeusExMachina: Sisko takes the Defiant into the wormhole to head off a fleet of several thousand enemy ships. Luckily, the Prophets intervene and somehow remove the entire enemy fleet from existence. It's nice to have a race of virtually omnipotent noncorporeal alien beings nearby, isn't it?
** However it's only a partial example, as the Prophets' help doesn't come out of nowhere. Their powers, presence and attitude were already long established.
** [[spoiler: And then, [[VideoGame/StarTrekOnline later on]], the Prophets put them back.]]
* TheDevTeamThinksOfEverything: In-universe example. When Dukat controlled Terok Nor ([=DS=]9), he installed an anti-insurgency programme as a failsafe against possible Bajoran revolt. Initial response was a station-wide lock-down that was designed to escalate towards self-destruction on the basis of any attempt to counter it and transmit an automated message to Cardassia explaining what was happening. When Dukat picks up the message, curiosity compels him to beam into Ops to see what's happening. He offers to stop the programme if they'll allow a Cardassian garrison on the station, but is refused. Unbothered, and confident they'll change their minds when destruction is imminent, he decides to beam back to his ship and wait. His attempt to leave reveals a new layer to the programme even Dukat didn't know existed. Believing him a coward who might abandon post if the situation became too much for him to cope with, Legate Kell had ensured that if he did such a thing, the programme would nullify his access codes, trapping him there to die with the Bajorans.
* [[DidYouJustPunchOutCthulhu Did You Just Punch Out Q]]: Commander Sisko, when Q tried playing a prank of a boxing match.
-->'''Q:''' "You ''hit'' me! ''Picard'' never hit me!"
-->'''Sisko:''' "I'm ''not'' Picard."
** This is later referenced in one of the ''TNG'' novels involving Q, with Picard noting that Q didn't return to [=DS=]9 after that incident. Picard says (only half-jokingly) that if he knew punching Q would prevent him from returning, he'd have done it at Farpoint.
* DiscountLesbians: Jadzia and Lenara in "Rejoined", as it is really their symbionts, Dax and Kahn, who had been joined to a husband and wife couple in the past, that were the ones having romantic feelings for each other rather than their current hosts.
* DisposableWoman: Jennifer Sisko, who died before she even got a line reading. We see more of her in flashbacks, and her Mirror Universe counterpart is still alive and kicking.
** Considering some of the flashbacks are in the pilot....she's a striaght version of PosthumousCharacter.
* DittoAliens: When Odo finally meets other Changelings, and they take a humanoid form, their faces are similar to Odo's. This doesn't make much sense, since Odo's face looks like that because he didn't have the skill to properly imitate humanoid facial structure, and other Changelings are shown to have that skill. It seems the Changelings were made to look like Odo just so the viewer would know they are part of the same race, even though this should be totally obvious anyway, as [[ViewersAreMorons both Odo and the other Changelings explicitly state that Odo is one of them]].
** After Sisko ends up [[EmergencyImpersonation taking the role]] [[TrickedOutTime of a 21st century]] [[YouWillBeBeethoven historical figure]], Quark fails to notice the resemblance even when it's pointed out to him, saying "All humans look alike."
* DivideAndConquer: Using Changeling agents, the Dominion is able to easily sow discord between its enemies while simultaneously seeming peaceful.
* DivineConflict: The Prophets, SufficientlyAdvancedAliens that the Bajorans view as gods, have {{Evil Counterpart}}s in the Pah-wraiths. According to legend the Prophets cast the Pah-wraiths out of the Celestial Temple (the wormhole) thousands of years ago, and they make repeated efforts to return during the series and battle the Prophets' representatives in the process. Implications are also made that the Prophets and Pah-wraiths are subtly influencing the course of the Dominion War in favor of the Federation Alliance or the Dominion, respectively.
* DivorceRequiresDeath: In "Second Sight", we meet a famous scientist who has everything... except his wife's love. And she comes from a culture that doesn't permit divorce, so she's slowly killing herself instead. The episode ends with him killing himself instead, so that she will be free.
* DoctorsOrders: Bashir relieves Kira of duty in ''Defiant'' because she's highly overworked, stressed out, and can't remember the last time she had a day off.
* DoesntLikeGuns: Odo states this preference in "Captive Pursuit" and his MirrorUniverse counterpart apparently does not agree. However, Odo would at the very least wield phasers in later episodes such as "Second Skin" and "Heart of Stone."
* DoesThisRemindYouOfAnything: The Cardassian occupation of Bajor, complete with labor camps and racially-charged rhetoric, is reminiscent of the [[{{A Nazi By Any Other Name}} Nazi regime]] (Deep Space '''Nein!'''). WordOfGod says that it was based on the WWII Japanese conquest of China.
** The Dominion also qualifies. Like the Nazis, the Changeling Founders consider themselves racially superior to "solids" and have no moral qualms about genocide.
** The Section 31 virus which afflicts the Changeling race is reminiscent of the HIV epidemic. First, the virus is spread by the physically intimate act of linking, the closest Changeling analog to sex. Like HIV, the virus is lethal, at least until a cure is discovered in season 7. Finally, the virus is deliberately developed by Section 31, a shadow organization under the Federation government, as a means of bringing about a Changeling genocide. This strategy is reminiscent of early [[http://en.wikipedia.org/wiki/Discredited_AIDS_origins_theories conspiracy theories]] surrounding the origins of HIV. That's right folks; Odo and the Female Changeling were metaphorically seropositive.
* DoggedNiceGuy: Bashir's pursuit of Jadzia Dax. Ezri later tells him that if Worf hadn't come along, [[RomanticRunnerUp Jadzia would've chosen Bashir.]]
* Creator/DonLaFontaine: He doesn't do the voice, but Quark does a pretty good impression of the stereotypical Don [=LaFontaine=]-voiced movie trailer in "Business as Usual". Which is then subverted by Dax's interruption.
--> '''Quark:''' Where I'm going, you can't follow. What I have to do, I have to do alone. ''One man...'' who's had enough... who's going to stand up and say...
--> '''Jadzia Dax:''' ''Goodbye, Quark!''
** In real life, Don voiced the syndicated promos for each episode, as he did for [=TN=]G (excepting the end where the local station put in their logo and timeslot; that was done by whoever VO'd the station at that point).
* DramaticPause: Sisko.. develops a.. bad case of.. Shatner.. Speak.. at times! (Interestingly, Avery Brooks's dramatic background was originally as a ShakespearianActor, just like WilliamShatner, and Shakespeare ''is'' known for a distinctive cadence...)
** This is even more evident with the one-shot character Laas. J.G. Hertzler, the actor who played him, has said he was deliberately imitating Shatner's Kirk while doing Laas' voice.
* DreamMelody: "Equilibrium".
* DrivenToVillainy: It's suggested that the Founders were once benign. However, species in ''Trek'' are instinctively hostile to shape-shifters. After centuries of various abuses, the Founders became bent on establishing ''Dominion'' over all "solids" in the universe.
** It wouldn't take a lot of instinct to be paranoid about them. Look at the panics humans have had historically, over witches, crypto-communists, etcetera. Now imagine that it's a group that not only you don't know who they are, but one that ''could replace members of your own family without you knowing.''
** Of course, this was suggested by ''[[UnreliableExpositor the Founders]]''...
** The idea is actually first floated in the early episode ''Vortex'', when Croden brings up the history of Changelings on his homeworld to embroider the truth a bit and get Odo to help him. Subsequent events in the episode make it easy to parse the truth from the lies, suggesting the Founder account is also largely accurate and they really are enacting a quadrant-scale episode of paranoid PTSD.
* DroppedABridgeOnHim: [[spoiler:Jadzia]] essentially dies for being in the wrong place at the wrong time, and her death was written in such a way as to ensure she had absolutely no shot at either defending herself or accomplishing anything in her last moments.
* DrowningMySorrows: Damar (He gets better).
* DyingAlone: Kira Nerys father Kira Taban was shot by the Cardassians. Although she was by his side for most of it, she left with the rest of her resistance cell to the kill those responsible. Her father [[TearJerker died alone, calling out her name, she only missed it by a matter of hours.]] It haunted her for the rest of her life.
** The episode that reveals this also has a Cardassian who became a surrogate father-figure to her dying. After learning of something he did during the Occupation she storms off, only to be convinced to return as "he doesn't deserve to die alone." She returns and stays with him until he dies, and then [[CrowningMomentofHeartWarming buries him next to her father]].
*** The reason he came to Kira as he was dying says a lot about their relationship, and about him. He was folowing an old Cardasian death tradition: Giving all your hoarded secret knowledge about your enemies to someone you trust to use it in a way that will grant you posthumous revenge. (This led to her learning what he had done as well.) In the end, Kira was astonished by his ability to struggle for every last second of life, even when there was no hope of gaining anything but more struggle.
[[/folder]]
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