* Unfortunately, most of the animated shorts made during TheSilentAgeOfAnimation have become lost films due to many factors, including carelessness with the source materials, the films simply deteriorating due to age, and in some cases, the cartoons being deliberately destroyed. And even for shorts that still exist in some form, even fewer still exist in their original form.
** The bulk of the KrazyKat Silent shorts were destroyed circa the 1940s when storing them became too expensive and troublesome for Winkler.
** WinsorMcCay's films as they are today only exist in dupe prints, as the originals had long since deteriorated.
** [[TerryToons Paul Terry's]] very first cartoon, "Little Herman" (1915) is probably lost too (the only evidence it even existed was an illustration and mention of it in the old Nat Falk's "How to Make Animated Cartoons" book), although this is not the case with his second film, which was the debut of Farmer Al Falfa—unfortunately, many of his silent Aesop's Fables have been lost.
** Even big series like FelixTheCat and the silent Disneys aren't immune to this; only a third of Felix's silent filmography still survives, many of the Alice Comedies are still missing, and only 17 of Disney's 26 OswaldTheLuckyRabbit shorts survive, and in the latter's case, Universal did not properly care for the negatives, so reissued prints and dupes (many of which had scenes rearranged or removed altogether) had to be used in lieu - ironically, this is not the case with the WesternAnimation/NewmanLaughOGrams, as all of them have managed to survive.
** ''The Newlyweds'' cartoon series by pioneer Emile Cohl, considered the first animated adaptation of a comic strip, is all but completely lost forever, save for one duplicated short, due to a lab fire destroying all of the original negatives.
** In the worst case scenario, entire series and several important films have become completely lost altogether, such as the very first full color cartoon, "The Debut of Thomas Cat".
* While TheGoldenAgeOfAnimation doesn't have it ''anywhere'' near as bad as the films of the silent era, there's still some problems with it occasionally popping up. The good news is that the bulk of the publicly screened theatrical cartoons of the day still exist in some form, and several companies such as Disney, MGM, Warner Bros. and even the [[ColumbiaCartoons Columbia Cartoon]] library have had their libraries restored, with only a handful if any flat out missing episodes (tragically, their handful of Barney Google shorts were deliberately destroyed due to a contractual obligation with King Features--only snippets of silent b&w dupes of one of the films is known to exist). Even the [[VanBeurenStudios Van Beuren studio]] and Terry Toons have virtually all of their sound films still existing in some way. The bad news is that this is definitely not the case with industrial films and commercials of the era, such as the films of the Jam Handy Studio and the shorts of the army based First Motion Picture Unit. On that note, many of the big studio cartoons have had their original titles removed in reissues, even having new titles spliced into the original negatives—this is the case with many of the BettyBoop and LooneyTunes shorts.
* ''WesternAnimation/FamilyGuy'':
** "Turban Cowboy" was pulled from FOX and Hulu after the Boston Marathon bombings that happened three weeks later. The main plot was about Peter converting to Islam as part of a terrorist plot and there was a cutaway of Peter driving drunk through a marathon, which only made things worse (especially when someone created a YouTube video that proved that SethMacFarlane somehow predicted this would happen). [=MacFarlane=] has gone on record to say that, much like "Not All Dogs Go To Heaven," he [[OldShame regrets making this episode]]. Despite the backlash, the episode has made a comeback in syndication, mostly on TBS and Creator/AdultSwim, and is on Netflix.
** "When You Wish Upon a Weinstein" was banned for potentially being offensive to Jews and Catholics, though [=MacFarlane=] and his crew actually brought in a rabbi to make sure the episode was "kosher," and, despite FOX's decision to pull the episode, it was released on the volume three DVD and when news hit that ''WesternAnimation/FamilyGuy'' was coming back with new episodes, this episode did air, but with some alterations[[note]]Peter's "Even though they killed my Lord" line in his song "I Need a Jew" was changed to "I don't think they killed my Lord" and Quagmire "looking for his keys" in front of Lois was shortened so it wouldn't look like masturbation[[/note]].
** "Partial Terms of Endearment" was banned for references to abortion, even though the episode is actually very even-handed on the subject and doesn't do a lot of bashing on people who are for or against it. It was most likely cut because FOX feared that people would write in and complain (as is the case with a lot of TV shows with controversial stories or series premises -- and this fear also affects advertisers as much as MoralGuardians). The episode also isn't shown on Adult Swim, TBS, or Netflix streaming, but has aired overseas on [=BBC3=] (with some parts cut for time and content) and is available uncut and uncensored as a standalone DVD release (see the BannedEpisode trope page for what it looks like).
** The VerySpecialEpisode "Screams of Silence: The Story of Brenda Q." only aired once on FOX, probably due to its realistic depiction of DomesticAbuse, but it can be seen on cable syndication and on Netflix.
* Disney Channel no longer shows an episode of ''WesternAnimation/PhineasAndFerb'' called "Ready for the Bettys" because a real-life band named The Bettys thought the episode was about them. The similarity was in name only as the styles of the two all-girl bands was different. As most half-hours of the series contain two episodes, "The Flying Fishmonger" is also out of rotation because it was paired with the episode. The episode remains on iTunes and Netflix.
** The full episode was aired again on Disney Channel on May 22, 2015 at 5:00am, and aired on Disney XD (for the first time) on June 10, during the marathon of every episode they have set to air in anticipation for the Series Finale.
* Four episodes of ''WesternAnimation/TheMagicAdventuresOfMumfie'' are missing on Hulu due to them being [[OldShame not liked that much by Britt Allcroft, the show's creator]]: "The Music of Spring", "Flying Fever", "Lighter Than Air", and "Aiming for the Moon".
* ''WesternAnimation/BatmanTheAnimatedSeries'' had a short pitch reel titled "The Dark Knight's First Knight" that was presented to FOX before production of the series formally began. It was never broadcast and left unseen for over twelve years until it was released on DVD as a bonus feature. Unfortunately, the original audio track was lost and dubbed over by the series' main theme.
** Also an in-universe example in ''[[Recap/BatmanTheAnimatedSeriesE18BewareTheGrayGhost Beware The Gray Ghost]]'', where someone is committing crimes as seen in the titular TV show. When Batman goes looking for episode recordings in order to find clues, he learns that the whole series has supposedly been lost after a fire in the archives.
* Due to the studio making more episodes than the network had ordered, four ''WesternAnimation/KingOfTheHill'' episodes past the GrandFinale ([[spoiler:the episode where Hank discover's Bobby's talent for identifying meat cuts and pointing out their flaws]]) were not in the network run and were only seen in syndication (including Creator/AdultSwim). The four episodes are:
** "The Honeymooners": [[spoiler:Hank's mom breaks up with her Jewish boyfriend -- from the ChristmasEpisode where Hank goes blind after seeing his mom and her first boyfriend have sex -- and plans to marry a man she just met and live in an RV]].
** "Bill Gathers Moss": [[spoiler: Bill takes in Principal Moss, who has been living in the school following his divorce, and an ex-Playboy centerfold as a roommate, after watching a sitcom about two roommates who get into wacky adventures. Unfortunately for Bill, Moss hooks up with the Playmate and they effectively strip Bill of any say of what is allowed and not allowed in the house and allow the Playmate's Russian counterfeiter boyfriend set up shop inside their home.]].
** "When Joseph Met Lori, and Made Out with Her in the Janitor's Closet": [[spoiler:Joseph starts dating a girl named Lori and the relationship quickly turns physical, and Dale, who refuses to talk to his son about sex, checks into a mental hospital for dementia. The episode's B-Story has Nancy and a coworker at her news station waging war with each other to find a human interest angle they can exploit for more airtime.]]
** "Just Another Manic Kahn-Day" [[spoiler:Hank convinces Kahn to stop picking up his medicine at the pharmacy -- only to learn when they hire Kahn to build a barbecue that Kahn is a manic-depressive and needs his medication to level him out, but Hank doesn't want Kahn to lose his manic energy to make the barbecue. Meanwhile Bobby tries to find the humor in a "Ray J. Johnson" comedy record that Peggy, Dale, Bill, and Boomhauer claim is funny.]]
* ''WesternAnimation/TheSimpsons'':
** The special "Springfield’s Most Wanted" aired just once, in September 1995, between a rerun of the season six finale "Who Shot Mr. Burns Part One" and the debut of the season seven premiere, "Who Shot Mr. Burns, Part Two". This episode was mainly a ClipShow with live action segments hosted by John Walsh, and had guest apperences by Los Angeles police chief Daryl Gates, Dennis Franz, Courtney Thorne-Smith, Kevin Nealon, Chris Elliott and Andrew Shue. Since this episode was connected to the "Who Shot Mr. Burns" contest, this episode only aired once on Fox (but it was shown more than once on Sky One in the UK). It can now be seen on the season six DVD set.
** In an attempt to prevent controversy from Japanese viewers, Fox never aired the episode "Thirty Minutes over Tokyo" in Japan or put it on the season 10 DVD set due to scenes that mock Japanese culture and society (the Simpsons having a seizure while watching a robot anime, Homer tossing the Japanese emperor into a sumo thongs Dumpster, and the Simpsons appearing on a sadistic Japanese game show). Which is just as well, since there is a gag relying on [[TranslationYes Homer saying a full sentence in Japanese, which is subtitled as simply, "D'oh!"]]
** Season 13's "Blame It on Lisa" was banned in Brazil for the same reasons why Japan banned "Thirty Minutes Over Tokyo" (stereotypical depiction of the country).
** For a long time the Simpson's episode The City of New York vs. Homer Simpson was originally taken out of syndication after the attack on the World Trade Center. The episode aired for the first time in syndication over 10 years later when it was aired in the every Simpson's episode ever marathon.
* ''WesternAnimation/BeavisAndButthead'':
** The third-season opener "Comedians" featured Beavis trying to juggle flaming newspapers and burning down a comedy club. Because it aired only a month before the Ohio mobile home fire that Beavis and Butt-Head were blamed for, this episode was swiftly pulled out of rotation and later heavily censored.
** Other ''Beavis and Butt-Head'' episodes were banned or heavily censored for instances of Beavis saying "Fire! Fire!" or flicking a lighter ("Stewart's House", "Kidnapped"), animal cruelty ("Frog Baseball", "Washing the Dog"), inhalant and drug abuse ("Home Improvement", "Way Down Mexico Way") or anything that might be considered in poor taste in the aftermath of Columbine and September 11th ("Heroes", "Incognito"). Many of these episodes have aired on Viacom-owned networks overseas unedited.
** There's also the music video segments. Who knows how many of them have been lost forever due to copyright issues? Fortunately, some of the rights have been secured, and over three dozen music videos have made it to the various Creator/MikeJudge collections.
* Dialogue was recorded for ''WesternAnimation/TheAngryBeavers'' series finale titled "Bye Bye Beavers", but it was never finished or aired, as per a rule stating that Nickelodeon series finales should not have [[EndOfSeriesAwareness self-referential humor about the series' end]]. (Supposedly, Nick considered breaking the rules for it, but ultimately left it unfinished due to the fact that the episode ended with the Beavers [[AscendToAHigherPlaneOfExistence going to Cartoon Heaven]], which was thought to be too sad for kids.) It was supposed to be paired with an episode called "A Tale of Two Rangers", of which no trace exists.
* [[WordOfGod Supposedly]] there are a number of Minerva Mink shorts from ''WesternAnimation/{{Animaniacs}}'' that never got released due to excessively risqué content, though given the content of the only two Minerva Mink shorts that ''did'' air, one has to wonder exactly why the network let those through.
** A lesser example of a missing ''segment'': Episode #55 has a wraparound that, for some reason, isn't on the DVD or on contemporary TV airings.
* ''WesternAnimation/EdEddNEddy'' has three of these. According to an interview with the show's creator, an episode titled "Special Ed" was produced but never completed, due to content he deemed "too real" for the series. Not much else is known about it other than the fact that it might have been [[ADayInTheLimelight an episode that focused on Ed]]. What became of two season five episodes, "Luck Be an Ed Tonight" and "A Room and an Ed", however, is unknown. The episodes may have been left unaired, or possibly never made. More information can be found [[http://ed.wikia.com/wiki/Season_5#Scrapped_Episodes here]].
** For a long time TheOtherWiki couldn't acknowledge the finale film ''Ed, Edd n Eddy's Big Picture Show'' as actually being real as no publicity had been put out for it until it finally aired in November 2009 on the American network.
** Also, three episodes are missing from Central European countries including Romania, Poland and Hungary: "The Ed-Touchables", "Pop Goes the Ed" and "Momma's Little Ed".
* On Cartoon Network and Boomerang feeds available in Eastern and Central European countries, the post-1948 ''WesternAnimation/LooneyTunes'' shorts are not shown because the channels only have the rights to the pre-1948 ones.
* After ''WesternAnimation/TimeSquad'' was canceled soon after being renewed for its second season in early 2002, a few episodes were held back/misplaced from the Creator/CartoonNetwork line up for a while for unknown reasons, including "Whitehouse Weirdness", an episode that parodied a ''Scooby Doo'' mystery, complete with the very same music and sounds from the original 1969 series [[note]](some blame the stringent censorship after September 11th at the time which toned down a lot of mockery of the President and U.S. officials, though the real reason could have been legal issues with using ''ScoobyDoo'' as a parody or show creator Dave Wasson having a falling out with his production crew and Cartoon Network subsequently firing him)[[/note]]. The finale was presumably "Nobel Peace Surprise", in the summer of 2002, with five more episodes seemingly stuck in limbo until the spring of 2003. Four of the said episodes eventually aired within the course of two months, with one episode held back all the way into November of that year. Incidentally, two of the episodes that aired in spring of 2003 were "Day of the Larrys" and "Ex Marks the Spot," which put the show's already-high HoYay count over the top (it can safely be assumed that content issues were behind those episodes being temporarily banned). The real finale "Orphan Substitute" (and the preceding cartoon, "Floral Patton") didn't air until November 2003, due to unfounded fear that viewers would complain about the show mocking then-U.S. President UsefulNotes/GeorgeWBush and the U.S. military.
* Several episodes of ''WesternAnimation/DaveyAndGoliath'' were presumed destroyed by the [[http://www.elca.org Evangelical Lutheran Church in America]], the successor to the church that commissioned the series, due to material that today's mainline denominations would consider unfit for airing on a children's program (such as racial stereotypes and sexism). They were later found, re-edited and released on DVD.
* The original broadcast masters for episodes of ''WesternAnimation/ScoobyDooWhereAreYou'' are long lost. The only episode whose master survived destruction was "Go Away Ghost Ship", and that version of the episode continues to air on Boomerang and is available on DVD. All other episodes were remastered from other prints.
* Two highly anticipated second season episodes of ''ComicStrip/TheBoondocks'' never aired on TV in the US, due to legal threats from various people associated with the BET Network (which was a major target of the two episodes: one where Huey protests over BET's programming by going on a hunger strike and the SequelEpisode in which Uncle Ruckus gets his own reality show and discovers through a [=DNA=] test that he is African-American, and not a white man with "reverse vitiligo"). They were released on DVD and [=iTtunes=], but there's still no word on if they will ever see the light of day on Creator/AdultSwim. Now that the show is canceled, the answer is a resounding, in-your-face, "No."
** [[SeasonalRot Season 4]] may very well be turning into a missing season, as [adult swim] has skipped over it in the rotation every time since the premiere of the last episode. Not that anybody would complain, since season four is widely regarded as the weakest season and Aaron [=MacGruder=] had nothing to do with its production. The only place to see season four (along with the first three good seasons) is on the complete uncut and uncensored DVD set and on Netflix, though the Canadian feed of Netflix has the two episodes that were banned for making fun on BET, along with two episodes that only aired once: "The Ballad of Jimmy Rebel"[[note]]which was banned due to excessively racist subject matter, as it focused on Uncle Ruckus befriending a country singer known for his anti-black songs[[/note]] and "Pause"[[note]]which was banned after Tyler Perry complained about the episode's antagonist, a TransparentGay, cross-dressing, God-fearing playwright and screenwriter named Winston Jerome, is based on him[[/note]]. The American Netflix, in contrast, has the fourth season, but not the four episodes that have been banned or are considered missing.
** According to [[WordOfGod Aaron McGruder]], there was a pilot made back when [[WhatCouldHaveBeen the show was originally being pitched to FOX]] that was never aired, but was occasionally shown at animation conventions.
** ''The Boondocks'' started life as a comic strip that ran in a college newspaper known as "The Diamondback". This version of the series has ''never'' been seen anywhere else, and even the nationally syndicated version of the comic has a lot of strips that ''still'' [[KeepCirculatingTheTapes haven't been collected into trade paperbacks]].
* The original pilot for the sadly short-lived ''WesternAnimation/FatherOfThePride'' never aired on the NBC run, and even failed to appear on the DVD release. It eventually popped up on Sky One in the UK. In addition to the pilot, three other episodes were produced but left unaired due to NBC's decision to cancel the series. One of them, like the pilot, ended up on Sky One in the UK.
* ''WesternAnimation/TheRenAndStimpyShow'' rolled out its own "Missing Episode" just after the end of the show's first run, though this may have been nothing more than a publicity stunt. The countless episodes yanked after one showing would be more serious. (Remember Mr. Horse's presidential bid? Yeah, neither do we.)
** A legitimate lost episode, entitled "Man's Best Friend", would have aired in 1992, but did not, due to an incredibly violent scene in which Ren beats his and Stimpy's new owner, George Liquor, within an inch of his life with an oar. It did not air in the United States until Spike TV aired it as part of the ''Ren & Stimpy Adult Party Cartoon'' series in 2003.
** ''Adult Party Cartoon'' itself suffered an early cancellation as a result of this, at least nine episodes were planned, but due to unmet deadlines, the show was pulled and only six episodes were made, three of which weren't shown at all outside DVD releases. Out of the three unfinished episodes, at least one, "Life Sucks", was storyboarded and voice recorded.
* Here's a missing segment of an episode: the ''WesternAnimation/SchoolhouseRock'' episode "Science Rock" reaired in 1979 and was supposed to air a segment titled "The Greatest Show on Earth", with weather as its main subject. Before the episode aired, the Ringling Bros.-Barnum and Bailey Circus Company objected to using the trademarked name as its title. As a result, ABC left this segment off the episode and also did not include it in the 1995 Science Rock VHS, either. It finally made its first appearance in the 30th Anniversary DVD under the name "Weather Show", but the references to the title were awkwardly and obviously edited.
* The animated adaptation of ''WesternAnimation/TheMask'' only aired seasons one and three on CBS. An entire season of episodes (one of which is the infamous "Flight as a Feather" episode) didn't air on CBS, but did find a home in syndication and on overseas Cartoon Network channels.
* ''WesternAnimation/AdventuresOfSonicTheHedgehog'' was hit with this a couple of times:
** The episode "Mass Transit Trouble", much of which revolves around a terrorist plot by Dr. Robotnik to destroy the Mobius transportation system with time bombs placed in various locations, was withdrawn from syndication following the Oklahoma City bombing and was never released on VHS, due to the similarities between the plot and the bombing itself. Eventually, Toon Disney picked up the episode and reran it for quite a while, then was pulled again (and yanked off any future DVD releases until 2008) after 9/11 [[TooSoon for the same reasons]]. It was not available anywhere until Shout! Factory released the episode on the "Volume 2" DVD and has now been allowed to rerun again. Rumor has it that the episode was close to not being produced ''at all'', thanks to [[http://en.wikipedia.org/wiki/Warrington_bomb_attacks very]] [[http://en.wikipedia.org/wiki/1993_World_Trade_Center_bombing similar]][[http://en.wikipedia.org/wiki/1993_Bombay_bombings events]] during production of the episode. Somehow they finished the episode and aired it anyway, and surprisingly to no controversy.
** For years there were rumors circulating that the original pilot episode of the show existed somewhere. A workprint of the halfway-completed pilot episode featuring the character dialogue albeit lacking sound effects and music was screened by DIC to representatives of Creator/{{ABC}} when [[WhatCouldHaveBeen the concept was pitched to the network]], who ultimately turned it down and requested DIC come up with [[WesternAnimation/SonicTheHedgehog another concept]]. While the original concept ended up becoming ''Adventures of Sonic the Hedgehog'' and was placed into syndication, the pilot itself was never finished, with parts of the pilot recycled for later episodes (including a notable part where Dr. Robotnik tries to crush Sonic with a giant weight, which was used as the series' closing credits). Nobody could manage to find the workprint for years until it eventually appeared on the internet, courtesy of lead animator Milton Knight, and was uploaded on YouTube.
* ''WesternAnimation/BuzzLightyearOfStarCommand'' had a VerySpecialEpisode that aired exactly twice before being removed from circulation. It used [[ILoveNuclearPower superpowers caused by phasing through radiation]] as metaphor for drugs, complete with ensuing withdrawal. The episodes "Inside Job" and "Conspiracy" were removed from circulation after 9/11, as both episodes dealt with assassination plots against ambassadors by a group of Anti-Galactic Alliance terrorists.
* ''WesternAnimation/TinyToonAdventures'':
** "Elephant Issues" had the final short of Buster, Plucky, and Hamton getting drunk off one beer, stealing a car while intoxicated, and ultimately killing themselves. It was last seen on the Fox run of the series and subsequently banned from rotation on The WB, Nickelodeon and Nicktoons. The other episode, "Toons From the Crypt" was initially rejected by the Fox broadcast standards and pratices due to the final short, which ended with Elmyra digging up the corpses of her dead pets. This short was eventually released on home video and the full episode was eventually allowed to air during reruns on Nickelodeon, while "Elephant Issues" appeared on the third volume DVD. These episodes eventually aired again when Creator/TheHub aired the show in reruns.
** The "Spring Break Special" aired only once on Fox in March 1994 and was never seen on TV again for reasons unknown. It finally aired again two decades later on Hub Network for Easter 2014.
* ''WesternAnimation/DextersLaboratory'':
** The episode "Rude Removal", where Deedee and Dexter go into a machine that removes all of their rudeness and concentrates it into another version of themselves, was removed for gratuitous swearing and rude gestures such as mooning and middle fingers. It's something of an oddball - they had only meant to show it off in conventions and the like as it never really was meant to be seen on TV. However, ''AdultSwim'' was able to convince them to finally air it in some manner. According to WordOfGod, it was intended to be part of the show's second season but Cartoon Network didn't approve of it.
** The ''Dial M for Monkey'' short "Barbecuor", shown in between shorts of ''Dexter's Laboratory'', caught heat from angry viewers after its first airing over Barbecuor being incredibly flamboyant and a walking gay stereotype, though other sources stated that Creator/MarvelComics threw a fit due to the character the Silver Spooner being a blatant ripoff of the ComicBook/SilverSurfer. The episode was removed afterwards and replaced with "Peltra."
* ''WesternAnimation/ThomasTheTankEngine'' has had a couple of sort-of instances of this. Based on a single photo, a rumour had been going around that a story called 'The Missing Coach' was filmed but never aired. This was dismissed as speculation until WordOfGod from the technical crew confirmed that it had been half-filmed. The episode would have aired as the 15th episode of Season 2, but showrunner Britt Allcroft felt that the plot point where Donald and Douglas switch tenders would be too confusing for little kids. The other was a number of episodes of a proposed spin-off called ''Jack and the Pack'' that didn't get picked up and which were eventually released three years later on DVD as part of the regular series. The rest of the episodes planned for the spin-off went unmade, and with them, a few characters never saw the light of day.
* ''WesternAnimation/{{Pingu}}'' went through this quite frequently.
** "Little Accidents", formerly known as "Pingu's Lavatory Story", was banned from airing in the U.S. due to its blatant depiction of PottyFailure in many scenes, and it was deemed impossible to edit the offending scenes without changing the plot. It continues to rerun elsewhere, including in the UK on Creator/TheBBC.
** "Pingu Quarrels With His Mum" was also pulled from American television, due to a shocking scene where [[AbusiveParents Pingu is slapped by his mother for insubordination]]. It was also banned from airing in countries where corporal punishment is a criminal offense. When broadcast on Creator/TheBBC, the offending scene was removed, but [[GettingCrapPastTheRadar the VHS and DVD releases there left the scene intact]].
** The pilot episode as well as "Pingu Dreams" have not been seen on the BBC since 2003. Although the former's reason for pulling is unknown (possibly for a distressing scene where Pingu's head is treated like a bouncing ball by a bully), the latter was pulled over the horrifying appearance of the leopard seal that invades Pingu's dream later on in the episode. Pulled for similar reasons two years later was "Pingu Runs Away", where Pingu encounters ice sculptures depicted as freakish monsters after he runs away from home. The appearance of the sculptures were deemed to be too risque for children. Neither this not the preceding two episodes have been shown in the U.S. as of 2005.
** "Pingu and the Doll" was banned in the U.S. and Canada thanks to scenes where Pingu dresses up as a Native American and attempts to intimidate one. Europe doesn't seem to have a problem airing it, though.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** The Italian dub skips the episode "[[Recap/MyLittlePonyFriendshipIsMagicS2E15TheSuperSpeedyCiderSqueezy6000 The Super Speedy Cider Squeezy 6000]]" for unknown reasons. There is proof that the episode has been dubbed (Flim and Flam's VA is listed in the Italian Season 2 credits), but the episode itself never aired. Many people think that it was because of references to alcoholism, but other references to cider in the series (like when Rarity dreams about cider in "Sisterhooves Social") are actually kept. In February 2015, the "Hasbro Studios Shorts" YouTube channel [[https://www.youtube.com/watch?v=K-mb8C5gqMA uploaded the Italian version of the Flim Flam Brothers song]], and the full episode will be released on DVD in May 2015.
** In a similar fashion, the Italian TV airings of "[[Recap/MyLittlePonyFriendshipIsMagicS4E7Bats Bats!]]", where every scene where cider is mentioned is cut. DVD will surely feature these scenes.
** In the Latin American dub, the 11th episode of the second season "[[Recap/MyLittlePonyFriendshipisMagicS2E11FamilyAppreciationDay Family Appreciation Day]]" was missing during Discovery Kids' premieres of other season 2 episodes. In fact, it didn't air until October 2013 (although it was made available on the Latin American Netflix a few weeks before it aired on Discovery Kids), after all of season 2 ''and'' Season 3 had premiered, and has been rarely re-aired for unknown reasons.
** A weird case of this trope is that the episodes "[[Recap/MyLittlePonyFriendshipIsMagicS2E4LunaEclipsed Luna Eclipsed]]" and "[[Recap/MyLittlePonyFriendshipIsMagicS2E13HearthsWarmingEve Hearth's Warming Eve]]" are skipped when Creator/TheHub reruns the series, despite important world-building happening in both of them. This is because they are holiday episodes, so The Hub will only show them once at those times of the year (if they are shown at all). Considering how much of the schedule this show takes up, those two episodes will only air about one-twentieth as often as any other episode. It also means these episodes have only aired three times each since they premiered. (Oddly, "[[Recap/MyLittlePonyFriendshipIsMagicS2E17HeartsAndHoovesDay Hearts and Hooves Day]]" is not taken out of the rerun schedules despite it being a Valentine's Day episode and bearing far less importance to the series overall than either of the former two.)
* ''WesternAnimation/SouthPark'':
** Happened to the two-parter episode "200" and "201". The episode "200" aired in rotation for a week before being pulled due to Parker and Stone violating a ban on usage of Mohammed/episodes based around a series of racist cartoons featuring Mohammed and "201" only aired once, with no reruns or repeats due to the two continuing the plot thread over Comedy Central's direct orders. While both episodes were released on DVD in the US (other countries did not get them or even see them), "201" is the heavily edited TV version which Comedy Central edited over Parker and Stone's objection, censoring every mention of Mohammad's name as well as the episode's moral advocating the use of violence and terrorism to get your way. Furthermore, while the episodes are available on DVD, they are not available for legal stream. Parker and Stone refused to allow the censored version of "201" to be streamed (having basically disowned the episode and including a disclaimer at the start of the episode, where they basically state that the episode was censored by Comedy Central and not a running joke the two came up with to mock the controversy over "200", like many had assumed it was at first) and as such, both episodes are not available on the South Park Studio website or on any other legal streaming website.
** This is not the first time episodes have been banned: "Not Without My Anus" and "Pip" were removed from rotation by Comedy Central for being filler episodes while "Jared Has Aides" and "Death" were both banned by the network for several years due to content ("Jared Has Aides" for child abuse humor that offended Comedy Central, "Death" for the episode's final scene where the kids decide to become drug addicts when they find their favorite TV show banned). However unlike 200 and 201, the bans were ultimately lifted and were in regular rotation when the show was officially went into syndication.
** The creation of a syndication package also led to more bannings due to certain episodes being too dirty for syndication or Parker and Stone refusing to allow them to be edited on the grounds of damaging the themes of the episode. "It Hits The Fan" (which is the one where they all say "shit") and "Major Boobage" in particular will not show up on local channels that show ''South Park'' anytime soon.
** The episodes "200" and "201" also pointed out that the earlier episode "The Super Best Friends" visually portrayed Mohammed without getting in trouble. Following the backlash of "200" and "201", "The Super Best Friends" was retroactively banned (though the season five DVD made before the Mohammad debacle has the episode as it used to be).
** The episode "Bloody Mary", which pokes fun at the tendency for Catholics to find meaning and images in mundane things, caught the attention of the chief executive of Comedy Central at the time, a devout Catholic. He took so much offense at the episode that it is now skipped in reruns and is banned from online streaming and inclusion in home video.
* ''WesternAnimation/AquaTeenHungerForce'' had an episode titled "Boston" that originally intended as the first episode of the series' fifth season and produced as its creators' response to the UsefulNotes/{{Boston}} bomb scare that Creator/AdultSwim caused on January 31, 2007 (with the city itself being a big target of the episode). However, Adult Swim pulled it to avoid further controversy surrounding the events of the bomb scare; and the episode to this day has never aired or been released to the public. The workprint of the episode was leaked onto YouTube in January of 2015; while the original upload was eventually taken down for copyright, the episode was available long enough [[KeepCirculatingTheTapes for fans to start circulating copies of the episode online]].
* ''WesternAnimation/RegularShow'':
** The first season episode "The Unicorns Have Got to Go" has never been shown in several Eastern and Central European countries, such as Poland, Hungary and Romania. The reason for its exclusion is unknown. It has also been rarely aired in the U.S., though the reasoning behind it could be because of the crude humor that was a little too AdultSwim for Cartoon Network (Mordecai drinking "unicorn slop," the unicorns pissing on the lawn, and the unicorns farting in Rigby's face). It was later included on The Complete First and Second Seasons DVD.
** Likewise, the Halloween specials have also been ignored in those regions, up until the 2014 Halloween season.
* Somewhere in the vaults of Nickelodeon[=/=]Creator/KlaskyCsupo's library lies ''WesternAnimation/RugratsGoWild'' in its original form as a 90-minute television special. Apparently test screenings were so positive, [[ExecutiveMeddling Paramount decided to shelve the television special in favor of remaking it as a feature film]].
* The [[WesternAnimation/TeenageMutantNinjaTurtles 2003-2009 series]] of ''ComicBook/TeenageMutantNinjaTurtles'' had an entire missing ''season'', which was shelved in favor of TMNT [[AC:[[RecycledINSPACE IN THE FUTURE!]]]] (though even the future season considers the missing one canonical). It was later shown on TV as the "Lost Season" and got a DVD release.
** There is another episode called "Insane in the Membrane" that never aired on FOX and still has not aired in the US (though it was available on DVD and shown on the former 4KidsTV site). It involves [[BigBad Baxter Stockman]] [[spoiler: cloning his old body and inserting his brain inside. It goes fine for a while but after a few months he begins to fall apart and constantly tries new ways to fix himself including chopping off limbs. Eventually he loses his mind and [[VillainousBreakdown blames April for all that has happened to him]]]]. To be fair, the episode was [[NightmareFuel quite disturbing]] for kids.
** Averted with "Nightmares Recycled", one of the episodes in the Lost Season, which was never completed due to similarly disturbing content. It apparently would've revealed that [[BigBad Hun]] and minor villain the Garbageman were [[spoiler:conjoined twins crudely separated at birth]], [[spoiler:with the Garbageman later being thrown in a dumpster]].
* ''WesternAnimation/CaptainNTheGameMaster'':
** Episode #27, "When Mother Brain Rules", is missing from "The Complete Series" DVD set because DiC Entertainment did not provide the master tape to Creator/ShoutFactory. Given that it was merely a ClipShow, this move may be justified.
** "How's Bayou" was never finished when it first aired on Creator/{{NBC}}, due to time constraints. It was later replaced with a second, more common version shown on the Family Channel, with some original dialogue replaced. Surprisingly, only the original version was released on DVD, so in a twist of irony, the second version is now the one considered lost.
* Two final season episodes of ''WesternAnimation/ClassOf3000'' were left unaired from the broadcast order. They are not yet available on DVD.
* Although the thirteen episodes of the 1975 [[Creator/TheBBC BBC]] animated series ''Bod'' are still readily available, its companion series, ''Alberto Frog and his Amazing Animal Band'', was not so fortunate. A victim of the 1993 children's television purge (see MissingEpisode/LiveActionTV for details), only five episodes of the original thirteen are known to survive; they were released on the ''Bod'' DVD collection in 2004.
* An episode of ''101 Dalmatians: The Series'', "Alive 'n Chicken" was pulled from broadcast after 9/11 (it's sometimes shown outside the United States), due to a scene where Spot crashes her airplane into a windmill. "Prima Doggy" was also pulled, but that was only because it was paired with "Alive 'n Chicken", and just airing "Prima Doggy" wouldn't fill 30 minutes on its own.
* ''WesternAnimation/SpongeBobSquarePants'':
** "Gary Takes a Bath" didn't air until July 2003, even though the episode it was paired with ("Shanghaied") aired in March 2001. This is because "Shanghaied" was originally a half-hour special where the viewers would call in and vote for one of the three alternative endings. It didn't re-air until July 2003, with "Gary Takes a Bath" replacing the seven minutes of deleted scenes. The uncut episode can only be viewed on the First 100 Episodes DVD. Both of these episodes were banned in the UK because of the perceived high scare factor of "Shanghaied", and the subliminal message girl from "Gary Takes a Bath". Granted, it's rather tame, but it was still a lost episode there for a long time.
** "Goo Goo Gas", a season five episode, didn't air in the USA until 8 months after the rest of the season (it aired in July 2009). This is possibly because its partner episode "Le Big Switch" didn't air very commonly because of... well, Nick being paranoid over "gay" stuff. It was however aired in multiple countries before the US and released on DVD before it's US airdate.
** "The Sponge Who Could Fly", also known as the "[[BlatantLies Lost Episode]]" parodies this, and it actually does an okay job of seeming real since it's only aired once every 4 years or so.
** "The Bad Guy Club for Villains" is an in-universe example, being a lost episode of [[ShowWithinAShow Mermaid Man and Barnacle Boy]].
** [[http://spongebob.wikia.com/wiki/List_of_deleted_scenes According to the official [=SpongeBob=] [=SquarePants=] Wiki's list of deleted scenes]]:
*** The season two episode "Wormy" (aired in the US in February 2001) was banned in some countries due to the scary close-ups of the buzzing horsefly being quite frightening to younger viewers.
*** Another season five episode, "The Two Faces of Squidward", was banned in a few countries due to two reasons: 1. Both "handsome" Squidwards (especially the second one that became MemeticMutation) really frightened younger viewers, and 2. The constant hitting Squidward in the face with a door, which a lot of countries don't tolerate.
* Several episodes towards the end of the final season of ''WesternAnimation/AsToldByGinger'' were never aired in the US.
** This includes the three-part series finale "The Wedding Frame", which was released straight to DVD in 2004, a few months after the general run of new episodes ended. At this point, six of the seven remaining episodes leading up to the finale had not aired (the seventh was a Thanksgiving episode called "Ten Chairs" that only aired once on Nicktoons during a Thanksgiving marathon). In 2006, the first of the unaired episodes ("Stuff'll Kill Ya") finally aired in the US for the first time on Nicktoons and eventually became part of the regular rerun rotation, but only on Nicktoons and not Nickelodeon. The remaining five episodes were scheduled to air within the next week but were replaced at the last minute. To this day, they remain unaired. However, they were available for purchase on iTunes and Amazon from 2013-15, and can easily be found on YouTube since they aired in other countries with no issue.
** Episode 4, "Sleep on It", was quietly pulled from the rerun rotation on both Nickelodeon and Nicktoons around 2003. The reason was never specified, but it may have been due to a scene near the end of the episode, where Hoodsey wakes up in a puddle of urine amongst a girls' slumber party. The girls all taunt him and when Ginger defends him, Courtney says that bedwetting is "disgusting". It is possible that someone felt this was either inappropriate or insensitive to children with bedwetting problems. The episode aired in other countries and was available for purchase on iTunes and Amazon. There are also comments about putting girls' bras in the freezer as a prank, another possibility of why the episode was pulled.
** Episode 35, "Ginger's Solo", was also pulled from Nicktoons within a few years, again for reasons unknown. Ginger pays a surprise visit to her summer crush Sasha only to find out he has a girlfriend named Clover. The most likely reason of this episode's pulling is that someone complained about the provocative way Clover was dressed, especially for someone who is supposed to be in junior high. The episode did still air occasionally on Nickelodeon and was available on iTunes and Amazon.
* The ''WesternAnimation/ChalkZone'' episode "The Smooch" is missing from the show's complete series DVD set on Amazon due to music rights. The Baha Men's cover of "Coconut" was prominently featured at the end of the episode, and it was too important to mute/edit out. The DVD contains the other episode and the music video it was paired up with originally ("Power Play" and "All The Way to The Top") at least; the [=iTunes=] episode collections didn't include any part of the half hour at all. The full episode did remain in the show's rerun rotation until 2013 (when Nicktoons took ''[=ChalkZone=]'' off the schedule).
* ''WesternAnimation/HouseOfMouse'' was known for reusing many segments from the previous show Mickey [=MouseWorks=] as well as having some [=MouseWorks=] shorts make their debut in ''House of Mouse'', but two [=MouseWorks=] shorts were never recycled as House of Mouse segments: "Minnie Takes Care of Pluto" due to being a BannedEpisode for having Pluto think that Minnie wants to kill him and dreaming that he is in Hell, and "Pluto gets the Paper: Vending Machine", which was omitted for unknown reasons.
* ''WesternAnimation/RobotChicken'':
** Two episodes from the first two seasons, "Adultizzle Swizzle" and "Blankets in a Pig", are edited versions of two previous episodes, "The Sack" and "Veggies for Sloth" respectively. Both have sketches deleted and replaced with new ones, such as a removal of a sketch from the latter crossing over {{ComicBook/Archie}} and Film/FinalDestination, due to copyright issues. Neither edit of the episodes are included on the DVD releases for those seasons. Interestingly, the original version of "Veggies for Sloth" usually plays as part of [adult swim]'s normal rotation, and not the edit, but both versions of "The Sack" seem to be absent. However, "Adultizzle Swizzle", the edited version, did get one airing on February 14th, 2015.
** A sketch from the episode "Vegetable Fun Fest", which features Beavis and Butt-Head joining the WesternAnimation/TeenTitans, was removed from the Season 1 DVD set, and has not been included on any home media release to this day, due to copyright issues of its own. However, the episode with the sketch airs normally on [as].
* The ''WesternAnimation/OggyAndTheCockroaches'' episode "(Un)happy Camper!" was promptly withdrawn from circulation by Creator/{{Nickelodeon}}, both from television and from their website, after complaints over a particular scene where a brief background image of a naked woman with exposed cleavage ended up [[GettingCrapPastTheRadar getting through Nick's censors]] and broadcast to American audiences. Overlapped with RoleEndingMisdemeanor when the series was soon pulled from Nickelodeon and shafted to sister channel Nicktoons.
* ''WesternAnimation/KaBlam'' had a number of episodes skipped once the show went into repeats on Nicktoons for unknown reasons (it was speculated that one reason was due to the ''WesternAnimation/AngelaAnaconda'' shorts as it got a spin-off on Fox Family which wasn't affiliated with Viacom in any way, but it turns out Nickelodeon owns the rights to their original shorts). Two episodes, "Just Chillin'!" and "[=KaFun=]!" have aired sparingly on Nickelodeon in the original run, and the latter has been speculated to only have aired once (at least in the US; it aired a few times in other countries). Nickelodeon's official sources say the show ran for 47 episodes, however "[=KaFun=]!" would make 48. There's possibility that Nick can't even locate the original episode master.
** One of the biggest examples of their missing episodes would have to be ''The Henry and June Show'', a PoorlyDisguisedPilot of a possible spin-off starring the titular hosts of the show. It only aired once in Summer 1999 and never again. It's unknown why it never re-aired, however a few reasons may have been due to the special using a real song ("Roll With The Changes" by Reo Speedwagon) and Nick had lost the rights to use it (though because the song was used as background music without anyone singing along, it could've very easily been replaced with an instrumental cue), a good chunk of the special consisting of nothing but [[UnintentionalPeriodPiece pop culture references of the late 1990s]] (thus making it age very badly), and Mark Marek, the creator of the Henry and June segments, thinking that the special came out "too rough".
** The ''Life With Loopy Birthday Gala-Bration'' special (which many fans had thought to be "Episode 29", a long-rumored SeriesFauxnale for the show that came up on Wikipedia in the early 2000s only for Mark Marek to debunk the rumor in 2012) from 1998 also only aired once and never again. However, as the special was basically a ClipShow, consisting of previous ''Life With Loopy'' shorts compiled together with wraparounds, it may have not been intended to air afterwards. It should also be noted that this and ''The Henry and June Show'' are not in the show's official episode count, so it wouldn't appear in any repeats on Nicktoons or outside the US.
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