John Deszo Ratzenberger (born April 6, 1947) is an American actor. He is most famous for his role as Cliff Clavin on the sitcom Cheers, a role he reprised in the Simpsons episode "Fear of Flying". He also has his own Food Network show and has appeared in every Pixar film since Toy Story. Ratzenberger guest starred in the season 26 episode, "Treehouse of Horror XXV" during the third segment, "The Others," in which he voices a computer/3D animated version of Homer Simpson.

Guest stars in Season 6
Steve AllenAnne BancroftMel BrooksDick CavettHenry CordenTed DansonDr. DementoDennis FranzWoody HarrelsonJames Earl JonesLarry KingMandy PatinkinRhea PerlmanTito PuenteJohn RatzenbergerWinona RyderSusan SarandonPatrick StewartMeryl StreepRon TaylorJohnny UnitasGeorge Wendt
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