William Daniels
- The Creeps - Behind the Scenes
2026 Thanks
- 115
2025 Kraft Intelligence (voice)
- The Creeps
2025 Kitt
- Superintelligence
2020 KITT (voice)
- Comedy Central Roast of David Hasselhoff
2010 K.I.T.T. (voice)
- Blades of Glory
2007 Commissioner Ebbers
- The Lottery
1996 Reverend Hutchinson
- Magic Kid II
1994 Manny
- Back to the Streets of San Francisco
1992 Julius Burns
- Clara
1991 Detective Lieutenant Fine
- On Thin Ice: The Tai Babilonia Story
1990 John Nicks
- Her Alibi
1989 Sam
- Making a Case for Murder
1989 Slaney
- Blind Date
1987 Harold Bedford
- The Little Match Girl
1987 Haywood Dutton
- The Princess Who Had Never Laughed
1986 Narrator
- Laugh Busters
1984 KITT (voice)
- Knight Rider: Knight of the Phoenix
1982 KITT (voice)
- Drop-Out Father
1982 Draper Wright
- Rehearsal for Murder
1982 Walter Lamb
- Rooster
1982 Dr. DeVega
- Reds
1981 Julius Gerber
- All Night Long
1981 Richard H. Copleston
- The Million Dollar Face
1981 Henry Burns
- The Blue Lagoon
1980 Arthur Lestrange
- Damien: The Leper Priest
1980 Bishop Koeckemann
- Conquest of the Earth
1980 Norman
- City in Fear
1980 Freeman Stribling
- Sunburn
1979 Crawford
- Bleacher Bums
1979
- The Chinese Typewriter
1979 C. Donald Devlin
- The One and Only
1978 Mr. Crawford
- Sergeant Matlovich vs. the U.S. Air Force
1978 Father Veller
- Big Bob Johnson and His Fantastic Speed Circus
1978 Lawrence Stepwell III
- Black Sunday
1977 Pugh
- Killer on Board
1977 Marshall Snowden
- The Return of the Incredible Hulk
1977 John Bonifant
- Oh, God!
1977 George Summers
- The Court-Martial of George Armstrong Custer
1977 Major Marcus Reno
- Sarah T. - Portrait of a Teenage Alcoholic
1975 Matt Hodges
- One of Our Own
1975 Dr. Moresby
- The Parallax View
1974 Austin Tucker
- A Case of Rape
1974 Leonard Alexander
- The Lie
1973 Albert
- Murdock's Gang
1973 Roger Bates
- The Fabulous Doctor Fable
1973 Elliot Borden
- 1776
1972 John Adams
- Marlowe
1969 Mr. Cromwell
- Two for the Road
1967 Howard Manchester
- The Graduate
1967 Mr. Braddock
- The President's Analyst
1967 Wynn Quantrill
- A Thousand Clowns
1965 Albert Amundsen
- Ladybug Ladybug
1963 Mr. Calkins
