Mordecai and Rigby set up an outdoor movie night, where they show a zombie movie that comes to life.
* BannedEpisode: Because of the zombie movie violence and horror, this episode doesn't air on a lot of overseas CartoonNetwork channels, specifically the Australian and Asian versions.
* ShoutOut: The entire episode is a homage to horror movies
** ''Zombocalypse'' strongly resembles ''Film/ArmyOfDarkness'' complete with BruceCampbell lookalike hero, the cover art of ''Zombocalypse'' resembles ''{{VideoGame/Doom}}'', the shot of the zombies reanimating in their graves looks similar to ''Film/TheReturnOfTheLivingDead'', and the concept of a movie creating zombies might be a reference to ''Film/{{Demoni}}''.
*** And on the video game side, the ultra-strong zombie at the end is similar to the Tank from ''VideoGame/Left4Dead''.
*** The zombie chick who almost bites the main character before Rigby bumps into the projector might be a nod to the "horror hags" from the original ''[[Film/TheEvilDead1981 Evil Dead]]''.
* ShowWithinAShow: ''Zombocalypse''
* ThreeDMovie: ''Zombocalypse'', shown in "Zetamax 3D" with red-green glasses. Mordecai and Rigby only figure out that the dead are ''really'' coming to life when they realize they're not wearing their glasses. Everyone else ''is'' wearing them, and just think the film has great special effects.