2007The Pixar StoryManny (voice) (archive footage)Movie
2001Hubert's BrainThe Professor (voice)Movie
2000Al Lewis: Forever GrandpaDr. Zachary Smith (archive footage)Movie
2000Buzz Lightyear of Star CommandEra (voice) · 2 episodesShow
1999Toy Story 2The Cleaner (voice)Movie
1998Toonsylvania21 episodesShow
1997Channel Umptee-3Stickley Rickets (voice) · 13 episodesShow
1997The Angry Beavers1 episodeShow
1996Superman: The Animated SeriesJulian Frey (voice) · 1 episodeShow
1996Quack PackProfessor Henry Villanova (voice) · 1 episodeShow
1995Freakazoid!Professor Jones (voice) · 6 episodesShow
1994AladdinAjed Al-Gebraic (voice) · 1 episodeShow
1993Problem Child(voice) · 13 episodesShow
1991Darkwing DuckPhineas Sharp (voice) · 1 episodeShow
1990The Adventures of Don Coyote and Sancho Panda13 episodesShow
1989Happily Ever AfterSunflower (voice)Movie
1987Visionaries: Knights of the Magical Light13 episodesShow
1987Pinocchio and the Emperor of the NightGrumblebee (voice)Movie
1986Witches, Warlocks & WizardsHostMovie
1985Rainbow Brite and the Star StealerCount Blogg (voice)Movie
1979$weepstake$Granger · 1 episodeShow
1978Vega$1 episodeShow
1978Battlestar GalacticaLucifer (voice) (uncredited), Lucifer, Lucifer (voice) · 6 episodesShow
1978EscapadeOz (uncredited) (voice)Movie
1978Last of the Good GuysDr. CropotkinMovie
1977Space Academy15 episodesShow
1976Monster SquadThe Astrologer · 1 episodeShow
1976Ark IIFagon · 1 episodeShow
1973Lost in SpaceDr. Zachary Smith (voice)Movie
1973My Favorite MartiansUncle Martin (voice) · 16 episodesShow
1972Sanford and Son1 episodeShow
1971Funny Face1 episodeShow
1971Once Upon a Dead ManMr. WortzelMovie
1970Night GalleryProf. Nicholas Porteus · 1 episodeShow
1969Love, American StyleHollister, Mr. Benjamin · 1 episodeShow
1968Lancer1 episodeShow
1968Land of the GiantsMr. Piper · 1 episodeShow
1968The Three MusketeersAthos · 18 episodesShow
1965Get SmartThe Ambassador · 1 episodeShow
1965Lost in SpaceDr. Zachary Smith · 83 episodesShow
1964Bewitched2 episodesShow
1964The RoguesPaul Duval · 1 episodeShow
1963The Bill Dana Show42 episodesShow
1960Outlaws1 episodeShow
1959The Third Man77 episodesShow
1959BonanzaCharles Dickens · 1 episodeShow
1959The Big FishermanLysiasMovie
1959Catch Me If You Can!LindströmMovie
1958Shirley Temple's StorybookLord Karsch · 1 episodeShow
1957Zorro3 episodesShow
1956Telephone Time1 episodeShow
1954Climax!Fritz Weiser · 1 episodeShow
1954King Richard IIExtonMovie
1953General Electric TheaterHong Kong Sam, Favier, Fouresh, Trapollini · 1 episodeShow
1952Botany BayTom OaklyMovie
1952The Adventures of Ozzie and HarrietFarnsworth · 1 episodeShow
1951Hallmark Hall of FameLegendre, Exton · 1 episodeShow
1951Schlitz Playhouse of StarsPopeau · 1 episodeShow
1948Studio OneMr. Dickinson, Master of Ceremonies, Dr. Wetheril, Lord James O'Brien · 1 episodeShow
Toy Story 2The Cleaner (voice)
A Bug's LifeManny (voice)
Spider-ManMiles Warren / The Professor (voice)
The Twilight ZoneGeorge Alfred
Bewitched