Some foreign versions have the picture on Stan's fez removed. Cryptograms shown at the very end of the episode's credits may also be removed.
In the Latin American version of the show, Waddles is referred as Pato which means "duck" in Spanish.
Louis C.K. originally made a cameo in two of the Weirdmageddon episodes as The Horrifying Sweaty One-Armed Monstrosity. But after C.K. admitted to sexual misdemeanors, Alex Hirsch re-dubbed the character. All future airings will be of these versions of the episodes.