* Every season of ''WesternAnimation/CodenameKidsNextDoor'' had one "ART" episode:
** Operation F.L.Y. - a NoDialogueEpisode.
** Operation R.E.P.O.R.T. - TheRashomon, told in five [[ArtShift completely different art styles]] (including a ''Anime/DragonBallZ'' parody).
** Operation A.R.C.H.I.V.E. - an [[AffectionateParody homage]] to "The Second Renaissance" from ''Anime/TheAnimatrix''
** Operation L.O.V.E. - a [[SchoolPlay Westside Story-esque musical]]
** Operation F.O.O.D.F.I.T.E. - a HeavyMetal RockOpera [[ShoutOut shouting out]] to ''TheWall''
** Operation S.C.I.E.N.C.E. - a string of {{Parody Commercial}}s for 2x4 tech
* ''WesternAnimation/SouthPark'':
** The "Terrence and Philip" movie and ''Literature/GreatExpectations'' episodes.
** "A Million Little Fibers" features none of the main cast. It does, however, feature a talking towel, Oprah Winfrey, a talking anus and a talking vagina.
** "Goth Kids 3: Dawn of the Posers" was entirely focused on the Goth kids, with none of the main cast again. Since the show missed the deadline for the first time ever, a rerun of another episode was aired, and when "Goth Kids" aired many fans felt rather underwhelmed.
* ''TheSimpsons'':
** The clip show episodes "So It's Come to This: A Simpsons Clip Show," "Another Simpsons Clip Show," "The Simpsons 138th Episode Spectactular," "All Singing, All Dancing," and "Gump Roast."
** The non-Halloween ThreeShorts episodes ("The Fight Before Christmas," "Four Great Women and a Manicure," "The Wettest Stories Ever Told," and "Simpsons Christmas Stories")
** "Twenty-Two Short Films About Springfield": An aborted BackDoorPilot showing what life is life for everyone else in Springfield besides The Simpson family.
** "Behind the Laughter": A parody of ''Behind The Music'' and ''E! True Hollywood Story'' showing The Simpsons as AnimatedActors and the ups and downs of their fame.
** "Springfield Up": A documentary visiting the adult population of Springfield who were interviewed as kids.
** "The Springfield Files": Creator/LeonardNimoy tells the story of how Homer encountered an alien.
** "The Simpsons Spinoff Showcase" and "The Simpsons 138th Episode Spectacular": Troy [=McClure=] hosting, and a lot of fourth-wall-breaking jokes about the show. "The Simpsons 138th Episode Spectacular" is also the only ClipShow episode where it doesn't involve the family sitting around and remembering past episodes.
** The flashback episodes ("The Way We Was"[[note]]how Homer and Marge met in high school[[/note]], "I Married Marge"[[note]]how Homer got Marge pregnant, married her, and applied as a nuclear plant worker[[/note]], "Lisa's First Word"[[note]]how Marge and Homer moved into their current house, how Marge got pregnant with Lisa, how Homer met Flanders and began borrowing stuff from him, and how Bart was jealous over Lisa[[/note]], "And Maggie Makes Three"[[note]]how Homer quit his job at the nuclear plant, only to re-apply after Marge becomes pregnant with Maggie[[/note]], "The Way We Wasn't"[[note]]how Homer and Marge unknowingly met as kids at a summer camp[[/note]], "Homer's Barbershop Quartet"[[note]]a Beatles parody episode centered on Homer and his friends becoming music stars in the mid-1980s[[/note]], and "That 90s Show"[[note]]how Marge and Homer broke up in the 90s before they had Bart[[/note]].
** The "Treehouse of Horror" Halloween episodes
** "Saddlesore Galactica": A BizarroEpisode that took potshots at its own SeasonalRot and complaints from fans about the SeasonalRot.
** "Moe Goes from Rags to Riches": An episode where a dishrag that existed since the medieval era tell its life story via the medium.
** "Bart vs. Thanksgiving" and "Like Father, Like Clown" are some of the few ''Simpsons'' episodes that were more dramatic than comedic and have the feel of a less preachy VerySpecialEpisode.
* ''WesternAnimation/{{Futurama}}'' occasionally showed flashback-based, almost art-house style episodes.
** They also did two "Treehouse of Horror"-style episodes ("Anthology of Interest"), meant to be a yearly thing.
** "Naturama", which is done in the style of a wildlife documentary with the cast portrayed as talking animals.
** "Reincarnation" and "Saturday Morning Fun Pit" depict the characters and their adventures in the styles of other types of animation, though there are differences. "Reincarnation"'s doesn't have a framing device and doesn't make fun of the animated genres it shows. It's more like "What if ''Futurama'' was an early 1930s black-and-white cartoon, or a 1980s video game, or a Japanese cartoon from the 1970s?" Meanwhile, "Saturday Morning Fun Pit" had a framing device with Richard Nixon's head and the headless body of Spiro Agnew trying to watch Saturday morning cartoons and having to deal with angry MoralGuardian protesters, the cartoon parodies shown were based on American cartoons (''Scooby Doo'', ''Strawberry Shortcake'', and ''G.I. Joe''), and the episode made fun of just how irritating the Saturday morning TV experience is once you take off the [[NostalgiaFilter nostalgia goggles]]: corny jokes, crummy writing, mediocre animation, media watchdog groups complaining about children's cartoons being too violent, and a lot of shows being little more than 30-minute commercials for toys and cereal.
* Very common on ''WesternAnimation/DextersLaboratory'': "Dim", a NoDialogueEpisode; "Deedeelocks and the Ness Monster", where Deedee tells a [[FracturedFairyTale bizarre fairy tale mashup]]; "Star Check: Unconventional", a parody of ''Series/StarTrekTheOriginalSeries'' in which a convention of doll collectors are treated as a strange alien culture; "Dexter and Computress Get Mandark", a goofy little story [[ArtShift apparently drawn in crayon]], with narration and dialogue provided by a tape sent in by a six year-old boy named Tyler Samuel Lee; and "La Bretto", which tells Dexter's life story in the form of an ''opera''. Really.
** There's also "Blackfoot and Slim", which is an episode presented as a nature documentry that observes Dexter (or Blackfoot as he is called in this episode) and his daily activities until he realises what's going on and tries to run away from them until he is shot with a tranquilizer dart.
** "Framed", a completely normal SliceOfLife story about Dexter's broken glasses starting a trend at school. It's very dialogue-heavy and introduces a bunch of characters that are never seen again.
*** Not technically true. Becky and Glenn do re-appear in a few other episodes, albeit DemotedToExtra.
* ''WesternAnimation/AmericanDad'':
** "Star Trek": a FilmNoir parody about Steve's rise to stardom after writing a book about Roger.
** "Tear Jerker" and "For Black Eyes Only": full-episode James Bond parodies
** "Blood Crieth Unto Heaven": a parody of the play "August: Osage County" with PatrickStewart shown in live-action
** The [[AnAssKickingChristmas ass-kicking Christmas episodes]] they've done, such as "The Most Adequate Christmas Ever," "Rapture's Delight," "For Whom the Sleigh Bells Toll," "Seasons Beatings," and the temporarily BannedEpisode "Minstrel Krampus."
** "Hot Water": A MusicalEpisode featuring a killer hot tub. Was meant to be the final episode of the series as the writers were afraid that ''American Dad'' would be canceled, but when news hit that it was renewed, they put this as a season seven premiere and wrote off the deaths as non-canon.
** "Lost in Space": ADayInTheLimelight for Jeff and a completely straightforward (except for a few jokes) science-fiction story.
* ''WesternAnimation/AvatarTheLastAirbender'' had "Tales of Ba Sing Se," in which the episode was divided into a series of four-minute short stories, highlighting different characters and their individual adventures in the city of Ba Sing Se.
** Not to mention the [[BetterThanABareBulb lampshade-happy]] "Ember Island Players", where the gang watches their adventures as performed by a (misinformed) theater troupe.
* ''[[SixTeen 6teen]]'' has "Dude of the living dead", which almost completely forgoes the show's typical teen-sitcom antics in favor of doing a {{parody}} of [[EverythingsDeaderWithZombies classic zombie movies.]]
* ''{{Transformers}} Armada'' had an episode that focused entirely on the Decepticons. Rad, the usual narrator, was replaced by Sideways, and the Autobots got barely any screen time, with the kids entirely absent.
* ''WesternAnimation/FamilyGuy''
** The three-part ''StarWars'' parody episodes: "Blue Harvest", "Something Something Something Dark Side", and "It's a Trap!".
** "Brian and Stewie": A BottleEpisode based on the ''All in the Family'' episode "Archie in the Cellar" where Brian and Stewie (meaning that it's SethMacFarlane talking to himself for 22 minutes) are locked in a bank vault for an entire weekend and play off each other.
** The season nine premiere "And Then There Were Fewer" is a feature-length episode (and the first episode to be shown in high-definition) presented as an almost straight Creator/AgathaChristie style murder mystery, in which several recurring characters are [[KilledOffForReal bumped off permanently]].
** "Screams of Silence: The Story of Brenda Q." takes the reference to Quagmire having a sister in an abusive relationship from "Jerome the New Black" and [[PlayedForDrama plays the domestic abuse as something that should be taken seriously for both the abuser and the victim]].
* ''{{Duckman}}'' had "American Dicks", presented as a detective show program on its [[MilestoneCelebration 100th episode]] with Duckman as the guest detective, complete with ShakyCam. [[spoiler: Ultimately, it was [[TheAce Cornfed]] who solved the case.]]
* ''WesternAnimation/BatmanTheAnimatedSeries'':
** "Almost Got 'Im", where the [[VillainsOutShopping villains play poker]] and swap stories about times they [[TitleDrop almost got Batman]].
** "Legends of the Dark Knight", where kids tell each other what Batman is ''really'' like (one says he's like the Creator/AdamWest version, one argues for the style of TheDarkKnightReturns, and all dismiss the kid who likes [[Film/BatmanAndRobin Joel Schumacher's version]].)
** "The Man Who Killed Batman", where a nobody mob underling, "Sid the Squid", acts as the lookout on a job in which Batman is apparently killed. From Sid's perspective, Bats fell into a gas explosion, but everyone else thought Sid pushed him. He has to deal with mooks who want to prove their toughness by challenging him, a [[TheOnlyOneAllowedToDefeatYou jealous]] Joker, an obsessed Commissioner Gordon, and [[TheDon a mob boss]] who thinks he's [[ObfuscatingStupidity making up the whole story]] as part of some scheme. The producers admitted that this episode was an experiment to see if they could make a good episode with Batman appearing as little as possible (indeed, Batman only appears for about three minutes total in this episode). Arguably, they succeeded.
** "I've Got Batman in My Basement", about two kids who take in an unconscious Batman and outwit the Penguin ''HomeAlone''-style. Unlike the others, this one was poorly received by fans.
** "Showdown", where Ra's al Ghul tells the story of how his son Arkady Duvall was thwarted by Jonah Hex in 1883.
* ''WesternAnimation/BatmanTheBraveAndTheBold'' had even more of these than ''Batman: TAS'' did and most of them were among the series' most popular episodes:
** ''Mayhem of the Music Meister'' was a MusicalEpisode that saw Batman, Aquaman and company fall under the spell of [[CanonForeigner The Music Meister]] (NeilPatrickHarris).
** ''Aquaman's Outrageous Adventure!'' relegates Bats to a supporting role and instead [[ADayInTheLimeLight focuses on]] ComicBook/AquaMan as he (begrudgingly) takes his family on vacation only to sneak away at any opportunity to help other heroes.
** ''Chill of the Night!'' features a much darker plotline with many [[ShoutOut shout outs]] to ''[[WesternAnimation/BatmanTheAnimatedSeries TAS]]'', a darker style of animation and an in depth look at Batman's origins (the show had previously stayed away from even showing Bruce without the mask, much less exploring his personal history).
** ''The Knights of Tomorrow!'' shows a possible future for Batman and features the animation debut of Damian Wayne, the current Robin.
** ''[[BizarroEpisode Bat-Mite Presents: Batman's Strangest Cases!]]'' was hosted by the 4th wall breaking Bat-Mite and showcased three bizarre interpretations of the Bat (all voiced by actors other than series star Diedrich Bader who voices a supporting part in one segment):
*** Bat Boy and Rubin, based off of the Magazine/{{MAD}} parody of the same name, trying to solve a series of strange murders.
*** A segment based off of the manga version of Batman, done in a style similar to the ''Anime/SpeedRacer'' cartoons. Features Batman and Robin facing off against "Lord Death Man" not long after he was introduced in the American comics by GrantMorrison.
*** Finally, the last segment features Batman and Robin teaming up with WesternAnimation/ScoobyDoo and friends to save Music/WeirdAlYankovic from the Joker and Penguin. Done in the [[StylisticSuck stilted and often flawed animation style]] of ''The New Scooby Doo Movies''.
** ''[[VillainEpisode Joker: The Vile and The Villainous!]]'' features SelfDemonstrating/TheJoker as the main character teaming up with obscure villain The Weeper against Batman. He even gets his own opening credit sequence and a ColdOpen where he and Misfit defeat Kamandi only for him to pull a double cross and [[EarthShatteringKaboom blow up a future version of Earth]].
** ''Bold Beginnings!'' is told almost entirely in flashback as ComicBook/{{Aquaman}}, ComicBook/GreenArrow and ComicBook/PlasticMan exchange stories about the first time they teamed up with Batman while waiting to be rescued for Mr. Freeze. Almost a reverse of "Almost Got 'Im" from TAS.
** ''[[VignetteEpisode Four Star Spectacular!]]'' is four shorts starring Adam Strange, The Flash, 'Mazing Man and The Creature Commandos with Batman only making cameo appearances.
** In the series finale ''Mite-Fall'' ComicBook/AmbushBug tries to stop Bat-Mite after he decides that the show should be cancelled to make way for another DarkerAndEdgier take and decides to use his [[RealityWarper fifth dimensional powers]] to make the show [[JumpingTheShark jump the shark]] [[TheOtherDarrin in]] [[CousinOliver pretty]] [[MerchandiseDriven much]] [[CharacterDerailment every]] [[TheScrappy way]] [[DarkerAndEdgier possible]] (even Ted [=McGinley=]!).
* In ''WesternAnimation/TeenTitans'' the series finale, "Things Change", kept the fight with the MonsterOfTheWeek to a small B-plot (and never did get around to resolving it), while most of the episode focused on Beast Boy trying to reconnect with a girl who may or may not be Terra. While the series always dealt with emotional issues, usually a layer of superhero metaphor was applied. Here it was simply, bittersweetly SliceOfLife.
** The final season had a couple of these. Another episode dealt entirely with Raven babysitting a trio of superpowered toddlers, and another was about the HIVE Five trying to capture Kid Flash, and Jinx's HighHeelFaceTurn.
* ''WesternAnimation/TwoStupidDogs'' did their final episode in the style of a [[TheSilentAgeOfAnimation 1920s silent cartoon.]]
* Season three of ''WesternAnimation/PhineasAndFerb'' had a number of AlternateUniverse episodes:
** "Tri-Stone Area" is a typical episode of ''P&F'', except all the characters are cave-people speaking [[TheUnintelligible a nearly incomprehensible caveman language]].
** "Doof Dynasty" featured Ancient Chinese versions of the main cast taking part in a spoof of {{Wuxia}} movies.
** "Excaliferb" featured Carl visiting Major Monogram and reading him a fantasy adventure story featuring medieval versions of the cast.
** "Phineas and Ferb and the Temple of Juatchadoon" revolved around Phineas and Ferb as Franchise/IndianaJones-esque {{Adventurer Archaeologist}}s.
** "The Wizard Of Odd" didn't feature any kind of project from Phineas and Ferb at all, instead focusing on Candace as the center of a TheWizardOfOz-type plot.
* The ''{{Sealab 2021}}'' episode "7211" is basically free of humor, because the ''Sealab 2020'' episode on which is is based (in which the crew works fast to save another submarine from nuclear meltdown) is left mostly unchanged, merely trimmed for time and re-dubbed in the ''2021'' voices. In the context of a series filled with non-kid-appropriate jokes and a crew that never gets its act together, the effect is AntiHumor.
* The ''WesternAnimation/DangerMouse'' episode "Once Upon A Timeslip" takes the cast to Medieval days to enact a Robin Hood story at the behest of the announcer and a quirky microphone. DM lampshades it early on:
-->'''DM:''' The announcer's voice is controlling the picture, dictating what we do!
-->'''Penfold:''' Crumbs, chief. What are we gonna do?
-->'''DM:''' Dunno...have a dafter adventure than usual, I suppose.
* ''WesternAnimation/AdventureTime'' gave us "Five Short Graybles" (five loosely-connected shorts with the unifying theme of [[spoiler:the five senses]]) and the ever-popular episode "Fionna and Cake", which [[GenderFlip Gender Flipped]] the entire cast.
** The episodes that focus on Marceline and Simon Petrikov (before he became the Ice King).
* One episode of ''WesternAnimation/MarthaSpeaks'' "Return of the Bookbots: the Case of the Missing Words" was an extended episode of the Bookbots, a potential TV series Martha had pitched back in "the Martha Show pt. 2". None of the regular characters appear outside of their Bookbot forms [[spoiler: well, at least not until the end, anyway]].
* ''WesternAnimation/{{Animaniacs}}'' has an episode that mixes all of the skits' different characters together, making for such hilariously awkward combinations such as "Mindy and the Brain," "Pesto and Runt", and "The Warner Bros and their sister Slappy."
** They also did some sketches featuring none of the typical cast (e.g. "The Flame", a candle flame watching ThomasJefferson write the Declaration of Independence) and/or more serious tones than the rest of the show (e.g. "Puttin' on the Blitz", a Rita & Runt segment set in World War II Poland).
* Every episode of ''WesternAnimation/SheepInTheBigCity'' ends with a rant from the Ranting Swede, except one that didn't. "Due to a scheduling conflict, we now present The Ranting Norwegian..."
* ''WesternAnimation/DarkwingDuck'' had a couple:
** "Darkwing Doubloon" portrays Darkwing and his supporting cast as daring swashbucklers out to stop a dreaded band of pirates as played by the Fearsome Five.
** "The Secret Origin of Darkwing Duck" features a framing device set in the far off future where an old janitor who may or may not be Darkwing's ghost telling two kids resembling Gosalyn and Honker his true origin, in which he was [[{{Superman}} sent to Earth as a baby after his planet exploded]].
** "A Star is Scorned" takes place in the real world with Darkwing and the rest of the cast as actors and themselves at the same time with Darkwing trying to keep his role as star of the show.
** "Twitching Channels" has Darkwing accidentally landing himself in [[RealWorldEpisode a human-populated universe where he is a fictional character]].
* ''CourageTheCowardlyDog'' has "Cowboy Courage", which takes a break fro the supernatural horror and instead has Courage dreaming about being a sheriff in the old west.
* The ''WesternAnimation/PinkPanther'' short "Pink-Outs" is different from the others, as it is just 12 short vignettes about the Panther engaging in various gags. These would eventually be used as bumpers on ''The Pink Panther Show''.
* The ''WesternAnimation/SpongebobSquarepants'' episode "Krusty Krab Training Video" plays out the style of an introductory video being played for a newly-hired Krusty Krab employee.