Jonathan Harris
- The Pixar Story
2007 Manny (voice) (archive footage)
- Hubert's Brain
2001 The Professor (voice)
- Al Lewis: Forever Grandpa
2000 Dr. Zachary Smith (archive footage)
- Buzz Lightyear of Star Command
2000 Era (voice)
- Toy Story 2
1999 The Cleaner (voice)
- A Bug's Life
1998 Manny (voice)
- Toonsylvania
1998
- Channel Umptee-3
1997 Stickley Rickets (voice)
- Superman: The Animated Series
1996 Julian Frey (voice)
- Quack Pack
1996 Professor Henry Villanova (voice)
- Freakazoid!
1995 Professor Jones (voice)
- Spider-Man
1994 Miles Warren / The Professor (voice)
- Aladdin
1994 Ajed Al-Gebraic (voice)
- Problem Child
1993 (voice)
- Darkwing Duck
1991 Phineas Sharp (voice)
- Happily Ever After
1989 Sunflower (voice)
- Pinocchio and the Emperor of the Night
1987 Grumblebee (voice)
- Witches, Warlocks & Wizards
1986 Host
- Rainbow Brite and the Star Stealer
1985 Count Blogg (voice)
- $weepstake$
1979 Granger
- Escapade
1978 Oz (uncredited) (voice)
- Last of the Good Guys
1978 Dr. Cropotkin
- Vega$
1978
- Battlestar Galactica
1978 Lucifer (voice) (uncredited)
- Space Academy
1977
- Monster Squad
1976 The Astrologer
- Ark II
1976 Fagon
- Lost in Space
1973 Dr. Zachary Smith (voice)
- My Favorite Martians
1973 Uncle Martin (voice)
- Sanford and Son
1972
- Once Upon a Dead Man
1971 Mr. Wortzel
- Funny Face
1971
- Night Gallery
1970 Prof. Nicholas Porteus
- Love, American Style
1969 Hollister
- Land of the Giants
1968 Mr. Piper
- Lancer
1968
- The Three Musketeers
1968 Athos
- Lost in Space
1965 Dr. Zachary Smith
- Get Smart
1965 The Ambassador
- Bewitched
1964
- The Rogues
1964 Paul Duval
- Outlaws
1960
- The Big Fisherman
1959 Lysias
- Catch Me If You Can!
1959 Lindström
- The Twilight Zone
1959 Doctor
- The Third Man
1959
- Bonanza
1959 Charles Dickens
- Shirley Temple's Storybook
1958 Lord Karsch
- Zorro
1957
- Telephone Time
1956
- King Richard II
1954 Exton
- Climax!
1954 Fritz Weiser
- General Electric Theater
1953 Hong Kong Sam
- Botany Bay
1952 Tom Oakly
- Omnibus
1952
- The Adventures of Ozzie and Harriet
1952 Farnsworth
- Hallmark Hall of Fame
1951 Legendre
- Schlitz Playhouse of Stars
1951 Popeau
- Lights Out
1949
- Studio One
1948 Mr. Dickinson
