History MissingEpisode / WebAnimation

* The original upload for the 12th episode of ''WebAnimation/BattleForDreamIsland'', A Leg Up in the Race featured Golf Ball with Another Name, even though she was eliminated in Lofty, along with Rocky, who switched teams in Lofty. This upload was deleted, and it’s unknown if anyone has the original version. The original upload for Gardening Hero had an error, which caused the rejoin auditions and voting screen to not appear. This one was also deleted, replaced with a complete cut. It’s also unknown if anyone has the original cut for this episode either.

* The original upload for the 12th episode of ''WebAnimation/BattleForDreamIsland'', A Leg Up in the Race featured Golf Ball with Another Name, even though she was eliminated in Lofty, along with Rocky, who switched teams in Lofty. This upload was deleted, and it’s unknown if anyone has the original version. The original upload for Gardening Hero had an error, which caused the rejoin auditions and voting screen to not appear. This one was also deleted, replaced with a complete cut. It’s also unknown if anyone has the original cut for this episode either.

* The ''WebAnimation/TVTomeAdventures'' movie is gone. The site which originally hosted the entire series has been dead for a long time, and the only person known to have recovered TheMovie, Tails Clock, has experienced some...er...problems with his site as of late. The only place left to host the series at all at this point is Chris Niosi's newgrounds page, and if anything were to happen to that...
** The credits, bloopers, and other material not uploaded to newgrounds is gone as well.
* The original upload for the 12th episode of ''WebAnimation/BattleForDreamIsland'', A Leg Up in the Race featured Golf Ball with Another Name, even though she was eliminated in Lofty, along with Rocky, who switched teams in Lofty. This upload was deleted, and it’s unknown if anyone has the original version.
** The original upload for Gardening Hero had a error, which caused the rejoin auditions and voting screen to not appear. This one was also deleted, replaced with a complete cut. It’s also unknown if anyone has the original cut for this episode either.
* Web cartoon ''WebAnimation/BonusStage'' never had an Episode 4 - Ep 4 being a number of previews for the artist's other works that was eventually removed. But one day, a "Lost Episode" was hidden behind a fake Internet Explorer 404 page. But the episode was clearly new as could be: references to later episodes and the series' oft-obnoxious fan community were animated half in full, early-series lazy animation, half with frame-by-frame animation. The episode was later re-re-lost in a site redesign.
** Which might have been because of Phil erasing the series from history in the 87th episode.

* In 2002, Sony Entertainment optioned ''ComicBook/LenoreTheCuteLittleDeadGirl'' for a possible animated movie release, but they couldn't come to artistic terms with creator Roman Dirge, so eventually they let the rights go back to him. In the interim, however, they produced a series of twenty-six Flash animated shorts based on the ''Lenore'' comics and hosted them on their Screenblast service. They took them down around 2008 or so, and have so far refused to release or re-host them, with fansites or YouTube as the only place to see them.

* The original upload for A Leg Up in the Race featured Golf Ball with Another Name, even though she was eliminated in Lofty, along with Rocky, who switched teams in Lofty. This upload was defeated, and it’s unknown if anyone has the original version.

* Production images of a ''{{Deadpool}}'' animated web short. The animation was cancelled and remains unfinished.

* The {{TvTomeAdventures}} movie is gone. The site which originally hosted the entire series has been dead for a long time, and the only person known to have recovered TheMovie, Tails Clock, has experienced some...er...problems with his site as of late. The only place left to host the series at all at this point is Chris Niosi's newgrounds page, and if anything were to happen to that...

* The {{TvTomeAdventures}} movie is gone. The site which the entire series was original hosted on has been dead for a long time, and the only person known to have recovered TheMovie, Tails Clock, has experienced some...er...problems with his site as of late. The only place left to host the series at all at this point is Chris Niosi's newgrounds page, and if anything were to happen to that...

* Several ''HappyTreeFriends'' episodes have not been uploaded to Mondo Media's Website/YouTube channel. Among them are a "Smoochie" episode with Cuddles, an entire episode of the TV series, one brief Christmas sketch, and two shorts starring Cro-Marmot (one of which is a pastiche of 1930s black and white cartoons, the other being an "interview" with him).

* The ''WebAnimation/HomestarRunner'' Strong Bad Email series played with this. Sbemail 22 was a missing episode for five months, but not because it had been suppressed or anything; the creators, in the process of creating the emails, had inadvertently skipped over that number. Between emails 40 and 41, they went back and created "sbemail 22" and jokingly promoted it as a missing episode.

* In 2002, Sony Entertainment optioned ''ComicBook/LenoreTheCuteLittleDeadGirl'' for a possible animated movie release, but they couldn't come to artistic terms with creator Roman Dirge, so eventually they let the rights go back to him. In the interim, however, they produced a series of twenty-six Flash animated shorts based on the ''Lenore'' comics and hosted them on their Screenblast service. They took them down around 2008 or so, and have so far refused to release or re-host them, with fansites as the only place to see them.

* A ''ComicBook/HowardTheDuck'' animated short was available on Marvel's website, but no archived copies have surfaced. There are also production images of a ''{{Deadpool}}'' animated short, but the animation was cancelled and remains unfinished.

* The ''WebAnimation/BarbieLifeInTheDreamhouse'' episode "New Girl in Town", which introduced BlackAndNerdy Grace, was marked Unlisted on Franchise/{{Barbie}}'s [=YouTube=] channel for a few months. The ''Life in the Dreamhouse'' Wiki attributes "bad comments" as the cause. Grace's next episode, "Malibu's Empirical Emporium", didn't even receive an English release, until April 2015-four months after Mattel shared and took away some dubbed versions of it.

* The ''WebAnimation/BarbieLifeInTheDreamhouse'' episode "The New Girl in Town", which introduced BlackAndNerdy Grace, was marked Unlisted on Franchise/{{Barbie}}'s [=YouTube=] channel for a few months. The ''Life in the Dreamhouse'' Wiki attributes "bad comments" as the cause. Grace's next episode didn't even receive an English release.

* The ''WebAnimation/BarbieLifeInTheDreamhouse'' episode "The New Girl in Town", which introduced BlackAndNerdy Grace, is currently marked Unlisted on Franchise/{{Barbie}}'s [=YouTube=] channel. The ''Life in the Dreamhouse'' Wiki attributes "bad comments" as the cause. Grace's next episode didn't even receive an English release, or a Wiki page. However, some of Barbie's fans have re-uploaded "The New Girl in Town" on their own channels, ensuring that it remains viewable.

* The ''WebAnimation/BarbieLifeInTheDreamhouse'' episode "The New Girl in Town", which introduced BlackAndNerdy Grace, is currently marked private on Franchise/{{Barbie}}'s [=YouTube=] channel. The ''Life in the Dreamhouse'' Wiki attributes "bad comments" as the cause. Grace's next episode didn't even receive an English release, or a Wiki page. However, some of Barbie's fans have re-uploaded "The New Girl in Town" on their own channels, ensuring that it remains viewable.

* Web cartoon ''Bonus Stage'' never had an Episode 4 - Ep 4 being a number of previews for the artist's other works that was eventually removed. But one day, a "Lost Episode" was hidden behind a fake Internet Explorer 404 page. But the episode was clearly new as could be: references to later episodes and the series' oft-obnoxious fan community were animated half in full, early-series lazy animation, half with frame-by-frame animation. The episode was later re-re-lost in a site redesign.

* Several ''HappyTreeFriends'' episodes have not been uploaded to Mondo Media's Website/YouTube channel. Among them are a "Smoochie" episode with Cuddles, an entire episode of the TV series, one brief Christmas sketch and two shorts starring Cro-Marmot (one of which is a pastiche of 1930s black and white cartoons, the other being an "interview" with him).

* Several ''HappyTreeFriends'' episodes have not been uploaded to Mondo Media's YouTube channel. Among them are a "Smoochie" episode with Cuddles, an entire episode of the TV series, one brief Christmas sketch and two shorts starring Cro-Marmot (one of which is a pastiche of 1930s black and white cartoons, the other being an "interview" with him).

* The third episode of ''Dudley Do-Right'', "Stokey the Bear", was banned from broadcast due to starring a pyromaniac pastiche of Smokey Bear, which the National Park Service was not pleased with.

* The ''HomestarRunner'' Strong Bad Email series played with this. Sbemail 22 was a missing episode for five months, but not because it had been suppressed or anything; the creators, in the process of creating the emails, had inadvertently skipped over that number. Between emails 40 and 41, they went back and created "sbemail 22" and jokingly promoted it as a missing episode.