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'''''Star Trek: The Animated Series''''' is an AnimatedAdaptation and the first SpinOff from [[Series/StarTrekTheOriginalSeries the original series]], continuing the initial five-year mission.

Given the reality that it was produced by Creator/{{Filmation}}, the animation is typically the studio's ultra-cheap style. However, they more than made up for that with most of the original cast and the writers as well (although Creator/LarryNiven was a tad lazy in squeezing ''The Slaver Weapon'' from his ''Literature/KnownSpace'' universe into that of ''Star Trek''). The result is a show that might not have the best animation, but still boasted spectacular imagery and believably non-human aliens that the original show could never depict, while still reasonably keeping to its artistic spirit. As a result, this series is the best example of the AnimatedAdaptation concept in the DarkAgeOfAnimation that was so good that it won the franchise's first ever Emmy Award.

''The Animated Series'' remains the shortest-lived series of the ''Trek'' franchise, with just 22 episodes airing over a 13-month period in 1973-74 on Creator/{{NBC}}. It was also the last ''Trek'' series to air in first-run on network television until ''Series/StarTrekVoyager'' debuted in 1995 on Creator/{{UPN}}.

However, the franchise creator, GeneRoddenberry, later insisted that the animated show be kept out of continuity since he never anticipated that ''Star Trek'' would later be revived in live action on such a scale as would happen. Still, many fans insisted that at least the best episode, "Yesteryear", be counted, considering that it gives a valuable look into Spock's youth and character as well as the planet Vulcan as told by the most authoritative voice on the matter, D.C. Fontana. Because of the information about Vulcan presented in the show, the introducing of the Holodeck, giving Kirk his middle name, and the fact that many of the ''Star Trek'' writers and actors were involved with the show, many fans consider it a part of their personal ''Star Trek'' {{canon}} of it depicting the final two years of ''Enterprise's'' five year mission. In addition, the producers of ''Series/StarTrekEnterprise'' used numerous references from this series. The ExpandedUniverse, already having less of a need to adhere to strict canon, even went so far as to revive the series' SixthRanger alien crew members, CatGirl Lt. M'Ress and [[MultiArmedAndDangerous tri-symmetrical Lt. Arex]].

Creator/{{CBS}} declared this series full canon around the time they released it on DVD.

The title used here and on the DVD release is a back-formation, as the show originally aired as simply ''Star Trek''. It's also known by the more ponderous title of ''[[LongTitle The Animated Adventures of Gene Roddenberry's Star Trek]]''.
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!!This series provides examples of:
* AbsenteeActor: Everyone ''except'' Spock, Sulu, and Uhura in "The Slaver Weapon". Chekov is absent the whole series.
* ActingForTwo: Everyone, besides the Enterprise crew and a few returning characters, are voiced by James Doohan or Majel Barrett.
* AFormYouAreComfortableWith: "The Magicks of Megas-Tu". The inhabitants of Megas-Tu do this for their own bodies and their planet's surface for the benefit of the Enterprise crew.
* AIIsACrapShoot: The planetary computer in "Once Upon A Planet".
* AlternateUniverse: "The Magicks of Megas-Tu" and "The Counter-Clock Incident".
* AncientAstronauts: Kukulcan in "How Sharper Than A Serpent's Tooth".
* AnimatedAdaptation: The best example thereof in the 1970s.
* ApocalypticLog: "Beyond the Farthest Star". The dead ship's log entry/warning.
* ArtificialGravity: "The Practical Joker" and "The Jihad".
* AscendedMeme: "Beam me up, Scotty!"
* AssInAmbassador: The title character in "Bem".
* AsteroidThicket: In "The Pirates of Orion", the Enterprise pursues the Orion ship into one.
* BarefootCartoonAnimal: Lt. M'Ress.
* BigDumbObject: "Beyond The Farthest Star"
* BigRedButton: "Beyond The Farthest Star". The auxiliary warp drive controls.
* {{Bowdlerise}}: By [[GermanTVStations German TV station ZDF]].
* BriarPatching: How Kirk tricks the computer in "The Practical Joker".
* BroadStrokes: The timeframe this series depicts is an accepted part of ''Franchise/StarTrek'' lore, but the actual details have been rearranged since.
* BuildLikeAnEgyptian: Kukulcan's city in "How Sharper Than A Serpent's Tooth".
* CanonImmigrant: Creator/LarryNiven's Kzinti and Slavers in "The Slaver Weapon".
* CatFolk: The Caitian Lieutenant M'Ress, as well as the Kzinti in "The Slaver Weapon". Some of the ExpandedUniverse material around it suggested that the Caitian relationship to the Kzinti is essentially the same as the one between the Vulcans and the Romulans, only with the ones that left (the Caitians) being the "good guys" that ended up part of the Federation and the ones that stayed (the Kzinti) as the militaristic bad guys with historic conflicts with the Federation (and possibly with some ill-advised genetic engineering on the part of the Kzinti).
* CatSmile:
** The cat-like Lieutenant M'Ress has one constantly.
** Averted by the Kzinti in "The Slaver Weapon", and in particular their telepath (Kzinti telepaths in general are stated to be manic-depressive).
* ChekhovsGun: "How Sharper Than A Serpent's Tooth". Dr. [=McCoy=]'s medical kit provides a hypo to calm the Capellan Power Cat.
* ChildrenAreCruel: In "Yesteryear", we get our first glimpse at Spock's childhood... and it's not pretty.
* CloningBlues: Spock in "The Infinite Vulcan".
* ContrivedCoincidence: "How Sharper Than A Serpent's Tooth". If Ensign Walking Bear hadn't been on the bridge, Kukulkan would have destroyed both the Enterprise and the entire human race.
* CoolOldGuy: Captain Robert T. April in "The Counter-Clock Incident".
* CreatorInJoke: Captain Robert T. April in "The Counter-Clock Incident". April was the original name for the character that eventually became Kirk.
* DarkerAndEdgier: Than most other cartoons on television at the time. ''The Animated Series'' tended to work with the same style of cerebral stories that the previous live-action series did, and references to death were not glossed over at all. In fact, "Yesteryear" deals with [[spoiler:a child version of Spock losing his beloved pet]], and the "death words" weren't glossed over or replaced with LighterAndSofter equivalents. This has helped the series gain a strong following within the ''Franchise/StarTrek'' fan community, as well as with the creative staffs involved with the franchise.
* DerelictGraveyard: "The Time Trap".
* DetachableLowerHalf: The title character in "Bem".
* DetachmentCombat: The title character in "Bem".
* DidWeJustHaveTeaWithCthulhu: "Once Upon A Planet".
* DidYouJustPunchOutCthulhu: "The Magicks of Megas-Tu" has ''[[CoolVsAwesome James T. Kirk defeating Satan!]]'' (or at least a being claiming to be him as part of a SecretTestOfCharacter)
* DoesNotLikeShoes: bios of M'Ress take pains to point this out.
* DolledUpInstallment: "The Slaver Weapon", from Creator/LarryNiven's "[[Literature/KnownSpace The Soft Weapon]]".
* DoomedDefeatist: Subverted with M-3-Green in "The Jihad".
* EmpoweredBadassNormal: Kirk (and a few others) gain magical abilities in "The Magicks of Megas-Tu".
* EnergyBeings: "Beyond The Farthest Star", "Bem".
* EnthrallingSiren: "The Lorelei Signal".
* EveryoneIsASuper: "The Magicks of Megas-Tu".
* ExiledFromContinuity: By Gene Roddenberry himself.
* ExpressiveEars: The Kzinti in "The Slaver Weapon".
* ExpospeakGag: Between Spock and [=McCoy=].
* {{Fainting}}: Kirk does something akin to the exhaustion- or anemia-based variety in "Albatross" when ThePlague kicks in. Luckily, Spock is there to catch him.
* FemalesAreMoreInnocent: "The Lorelei Signal". The women of the planet Taurus II are effectively psychic vampires who drain the energy from men to survive, [[InferredHolocaust and have been doing so to the crew of passing ships for at least 150 years]]. They try to do the same to Kirk, Spock, and Dr. [=McCoy=] and are only stopped by threat of force from Uhura... yet they're still presented as sympathetic to both the viewer and the heroes because they "cannot bear children" and the end of the episode has the Enterprise crew promise them [[KarmaHoudini a ship to be able to leave their planet and thus escape the "curse" of immortality]].
* FilmingForEasyDub
* FishPeople: "The Ambergris Element"
* FiveYearPlan: The three seasons of ''The Original Series'' and the two seasons of ''The Animated Series''.
* FollowTheLeader: ''SpaceBattleshipYamato'' borrowed from "Beyond The Farthest Star".
* ForWantOfANail: "Yesteryear"
* ForgottenPhlebotinum: The "life support belts".
* FountainOfYouth: The reverse-entropy universe in "The Counter-Clock Incident".
* FourFingeredHands: Spock, in a blooper in "Yesteryear".
* FriendlessBackground: "Yesteryear" lets us see Spock having this. His agemates torment him endlessly for being "a Terran" and Sarek, who expects his son to act like a Vulcan, is disappointed by Spock reacting to their teasing.
* FurryFandom: Lt. M'Ress was a FetishFuel character for many early Furries.
* GiantFlyer: "The Infinite Vulcan" and "The Eye of the Beholder".
* [[GirlsNightOutEpisode Girl's Night Out Episode]]: "The Lorelei Signal".
* GodGuise: Keniclius 5 with the Phylosians in "The Infinite Vulcan", and Kukulkan by the ancient Mayans in "How Sharper Than A Serpent's Tooth".
* GrandfatherParadox: Spock in "Yesteryear".
* HauntedTechnology: The Enterprise computer in "The Practical Joker".
* HealingHands: "The Infinite Vulcan". Spock's clone revives his original with a mind meld. Because of the difference in scale (the clone is a giant), he uses just one fingertip.
* HighTechHexagons: "Beyond the Farthest Star". The Enterprise crew discovers a highly advanced alien ship in orbit around a dead star. The alien ship's interior structure is made up of interlocking hexagons.
* HolodeckMalfunction: "The Practical Joker". [=McCoy=], Uhura and Sulu are trapped in it.
* HollywoodPsych: "Mudd's Passion" mixes up two types of love: friendship and eros.
* HumanAliens: Although there are still a fair few, this show took advantage of the animated format to avert the trope whenever they could and come up with more divergent alien designs.
* HumanityOnTrial: "The Magicks of Megas-Tu"
* ImprobablyHighIQ: The Lactrans in "The Eye of the Beholder". A six-year-old Lactran has an IQ in the thousands.
* InSpaceEveryoneCanSeeYourFace: Life-support belts
* IncredibleShrinkingMan: "The Terratin Incident"
* IndyHatRoll: In "Once Upon A Planet", Kirk leaps through a sliding rock door in the side of a mountain just before it closes.
* InstantAIJustAddWater: The planetary computer in "Once Upon A Planet" develops artificial intelligence on its own.
* IntelligentGerbil: The Kzinti in "The Slaver Weapon", and the Caitian M'Ress.
* ItBelongsInAMuseum: Sulu in "The Slaver Weapon". Spock sets him straight.
* ItIsPronouncedTroPAY: In "The Pirates of Orion", Orion is pronounced "OH-ree-on".
* JustBetweenYouAndMe: Charr in "The Jihad".
* LifeDrinker: "The Lorelei Signal". The women of the planet Taurus II drain the LifeEnergy of men to maintain their youth, causing RapidAging in the men.
* LimitedAnimation
* LosingYourHead: The title character in "Bem".
* LostColony: Terra Ten in "The Terratin Incident"...only it wasn't really lost just shrunken to an extremely tiny size.
* LotusEaterMachine: Kukulcan's zoo animals in "How Sharper Than A Serpent's Tooth".
* LouisCypher: Lucien in "The Magicks of Megas-Tu"
* LovePotion: "Mudd's Passion"
* MacGuffin: The "Soul of Alar" artifact in "The Jihad"
* MeaningfulName: Bem, which means "Bug Eyed Monster" in SF fandom.
* MegaNeko: The Kzinti in "The Slaver Weapon", as well as Lieutenant M'Ress.
* MerlinSickness: "The Counter-Clock Incident"
* MobileFishbowl: "The Ambergris Element". At the end of the episode, two Aquans (aliens who can only breathe water) are shown on the bridge of the ''Enterprise'' wearing water-filled helmets on their heads.
* TheMole: Charr in "The Jihad".
* MorphWeapon: The title device in "The Slaver Weapon".
* MrExposition: Ensign Walking Bear in "How Sharper Than A Serpent's Tooth".
* MyFutureSelfAndMe: Spock in "Yesteryear."
* MysteriousMiddleInitial: It was actually in this show that Kirk's middle name was first revealed to be Tiberius, though it wouldn't officially enter canon until the sixth film.
* NeglectfulPrecursors: The Slavers' stasis boxes.
* NeverSayDie: [[AvertedTrope Actively averted.]], which became a rather large source of controversy in the episode "Yesteryear"
* NoMacGuffinNoWinner: The end of "The Slaver Weapon".
* NoOneGetsLeftBehind: Kirk and Spock in "The Jihad" when the Vulcan gets thrown from a vehicle into the path of a lava flow.
* {{Novelization}}: The animated episodes were novelized by Creator/AlanDeanFoster.
* NowDoItAgainBackwards: How the computer is repaired in "The Practical Joker".
* OceanPunk: "The Ambergris Element"
* OffModel
* OpeningNarration: An animated version of the one in ''Series/StarTrekTheOriginalSeries''.
* PatchworkMap: "The Eye of the Beholder"
* PatchworkWorld: "The Eye of the Beholder"
* PeopleZoo: "The Eye of the Beholder"
* PettingZooPeople: Lieutenant M'Ress.
* ThePlague: "Albatross", "The Infinite Vulcan".
* PlanetEater: "One Of Our Planets Is Missing"
* PlantAliens: The Phylosians in "The Infinite Vulcan".
* PleasurePlanet: "Once Upon A Planet"
* PortalToThePast: The Guardian of Forever in "Yesteryear".
* PsychicStatic: Used to defeat the Kzinti telepath in "The Slaver Weapon".
* PreemptiveDeclaration: In "Albatross", when a native from the planet that put [=McCoy=] on trial follows them.
-->'''Kirk''': Besides, he'll be sure to take advantage when he sees that we've carelessly left our shuttle bay door open.
-->'''Uhura''': But we didn't, sir.
-->'''Kirk''': Oh yes. See to that little oversight, will you, Mr. Sulu?
* TheQuest: The hunt for the "Soul of Alar" artifact in "The Jihad".
* RapidAging: What the LifeEnergy draining by the women of Taurus II does to men in "The Lorelei Signal".
* [[RealMenWearPink Real Klingons Wear Pink]]: courtesy of a colourblind director.
* RealityIsOutToLunch: The planet Megas-Tu in "The Magicks of Megas-Tu".
* RealityWarper: The inhabitants of the title planet in "The Magicks of Megas-Tu".
* RecursiveAdaptation: "The Slaver Weapon".
* RecycledSoundtrack: Well, duh, it's Filmation. While yes, this was also done on ''The Original Series'', it definitely wasn't to the same extent.
* ReplacementGoldfish: Carter Winston (actually a shape shifting alien).
* RetGone: Spock in "Yesteryear".
* RippleEffectProofMemory: Only Spock and Kirk remember the original timeline in "Yesteryear".
* RiteOfPassage: The Vulcan kahs-wan in "Yesteryear".
* RoboSpeak: Any computer voice done by James Doohan.
* RoleReprisal: The entire cast, minus Walter Koenig, reprised the roles they played on the original series William Shatner as Kirk, Leonard Nimoy as Spock, [=DeForest=] Kelley as [=McCoy=], James Doohan as Scotty, George Takei as Sulu, Nichelle Nichols as Uhura, and Majel Barrett-Roddenberry as Nurse Chapel.
** Instead of providing Chekov [[TheOtherDarrin another voice actor]], they instead replaced him with two new characters: Arex (voiced by James Doohan) and M'Ress (voiced by Majel Barrett). Koenig would wind up contributing to the series by writing the episode "The Infinite Vulcan".
** For guest stars, Mark Lenard reprised his role of Sarek in "Yesteryear", Stanley Adams reprised his role of Cyrano Jones in "More Tribbles, More Troubles", and Roger C. Carmel returned as Harry Mudd in "Mudd's Passion".
* {{Rotoscoping}}: How the animation of the ''Enterprise'' was created.
* SequelEpisode: "Mudd's Passion", "More Tribbles, More Troubles", and "Yesteryear", to ''Series/StarTrekTheOriginalSeries'' episodes.
* SdrawkcabName: The retlaw plant in "The Infinite Vulcan", and the planet Arret in "The Counter-Clock Incident".
* SealedEvilInACan: "Beyond The Farthest Star"
** Played with by the titular weapon in "The Slaver Weapon". Spock and Sulu discuss the potential for such a weapon to destabilize the entire galaxy if it were to fall in to the wrong hands; however, [[AIIsACrapshoot the weapon is self-aware]] to the extent that it can determine that it's not being handled by an authorized user and [[TakingYouWithMe self-destructs when the Kzinti try to activate it]].
* SecretTest: "The Magicks of Megas-Tu". The Megans test the ''Enterprise'' crew to verify their good intentions.
* SelfDestructingSecurity: "The Slaver Weapon". The title device tricks the Kzinti into using a self-destruct setting to destroy it...and them.
* SelfGuardingPhlebotinum: In the episode "The Jihad", the Soul of the Skorr is protected by a force field.
* SickeninglySweethearts: Spock behaves this way toward Nurse Chapel for a large part of "Mudd's Passion", because he's reacting to a LovePotion.
* SingleBiomePlanet: A Volcano Planet in "The Jihad", an Ice Planet in "The Slaver Weapon" and a Water Planet in "The Ambergris Element".
* SnakeOilSalesman: Harry Mudd in "Mudd's Passion", Cyrano Jones in "More Tribbles, More Troubles".
* SpacePirates: "The Pirates of Orion"
* SpaceshipGirl: The Enterprise computer in "The Practical Joker".
* SpaceshipSlingshotStunt
* SpiritualSuccessor: "One Of Our Planets Is Missing" to ''TOS'' episode "The Immunity Syndrome".
* StableTimeLoop: "Yesteryear"
* StarfishAliens: Edosians, Vendorians, Phylosians, Lactrans, and M/3/Green. The production team was clearly thrilled to not have to worry about budget constraints when designing the aliens, to the point that they probably went overboard with it.
* StealTheSurroundings: In "The Terratin Incident", an entire miniaturized city is beamed aboard the Enterprise in order quickly to save the inhabitants from impending doom.
* SufficientlyAdvanced: "Bem", "The Eye of the Beholder", and "The Jihad".
* SuspiciouslySimilarSubstitute: Arex, to Chekov.
* SwissArmyWeapon: "The Slaver Weapon"
* TalkingToHimself: Characters voiced by Majel Barrett and James Doohan.
* TieInNovel: Creator/AlanDeanFoster wrote adaptations of the episodes, and many ''Trek'' novels referenced it.
* TemporalParadox: "Yesteryear"
* TheTimeTravellersDilemma: Thelen the Andorian in "Yesteryear".
* ThereIsNoKillLikeOverkill: "The Slaver Weapon", a ''hand weapon'' capable of generating a Hiroshima-like detonation complete with shockwave!
* [[TitleTheAdaptation Title: The Adaptation]]: As noted, however, this is only the case for the re-releases. It originally aired just as "Star Trek," with no subtitle.
* TrapIsTheOnlyOption: Hints of this in "The Pirates of Orion". [=McCoy=] and Scotty are suspicious when the Orion captain asks Kirk to beam down to an asteroid to get the medicine he and his crew stole. Kirk agrees that it's dangerous, but he also knows that "without it, Spock doesn't have a chance."
* TwentyMinutesIntoTheFuture: Thanks to a blooper involving the mustached Lt Kyle, one shot of Scotty working the transporter momentarily showed him with a mustache, five years before his live action mustache's debut in ''Film/StarTrekTheMotionPicture''.
* TwoOfYourEarthMinutes: "The Lorelei Signal".
* VengefulVendingMachine: "The Practical Joker". After the ''Enterprise'' passes through a mysterious energy field, the ship's computer starts playing practical jokes on the crew. When Scotty tries to obtain a sandwich from the food synthesiser it sprays food all over him, including a custard pie in the face.
* VoluntaryShapeshifting: The Vendorian in "The Survivor".
* WellDoneSonGuy: Spock and Sarek
* WhoWantsToLiveForever: The alien women in "The Lorelei Signal".
* WingedHumanoid: The Skorr show up in several episodes.
* WitchSpecies: "The Magicks of Megas-Tu"
* WorldOfChaos: The planet in "The Magicks of Megas-Tu", and the so-called "Mad Planet" in "Jihad".
* WronglyAccused: [=McCoy=], in "Albatross".
* YearOutsideHourInside: This occurs in the title area in "The Time Trap".
* YouAreInCommandNow: Lt. Uhura in "The Lorelei Signal", something which never happened on the live-action show.
* YouCanSeeThatRight: Kirk to Spock in "The Time Trap" when the Klingon battlecruiser disappears.
* YouWontFeelAThing: In the episode "The Pirates of Orion"...
-->'''[=McCoy=]:''' (''about to give an injection'') This won't hurt a bit, Spock.\\
'''Spock:''' An unnecessary assurance, doctor, in addition to being untrue.\\
'''[=McCoy=]:''' That's the last time I waste my bedside manner on a Vulcan.

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!!Provides aversions of:

* LighterAndFluffier: One of the main reasons given by GeneRoddenberry as to why he chose Filmation out of all the animation companies who made a pitch at doing ''The Animated Series'' is because they were the only company who didn't suggest giving the ''Enterprise'' crew "funny animal sidekicks". Interestingly, ''after'' getting the job, the idea apparently did surface at pre-production meetings... but it was quickly (and rightly) kyboshed by Roddenberry. Regardless, Filmation didn't let the concept of "funny sidekicks in space" go to waste and created the live-action series ''SpaceAcademy'' a few years later.
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