Credits

• 2025 · The Creeps as Kitt
• 2025 · 115 as Kraft Intelligence (voice)
• 2020 · Superintelligence as KITT (voice)
• 2014 · Girl Meets World as George Feeny
• 2010 · Comedy Central Roast of David Hasselhoff as K.I.T.T. (voice)
• 2007 · Blades of Glory as Commissioner Ebbers
• 2005 · The Closer as Andrew Schmidt
• 2005 · Dancing with the Stars as Self - Guest Dancer
• 2005 · Grey's Anatomy as Craig Thomas
• 2004 · Boston Legal as Milton Brody
• 2003 · The Lyon's Den as
• 2003 · Comedy Central Roasts as Self
• 2002 · Kim Possible as Robot Pilot (voice)
• 2002 · NBC 75th Anniversary Special as Self
• 2001 · Scrubs as Dr. Douglas
• 1998 · The King of Queens as Phillip Waldscott
• 1996 · The Lottery as Reverend Hutchinson
• 1995 · Maybe This Time as George Feeny
• 1994 · Magic Kid II as Manny
• 1994 · The American Revolution as John Adams
• 1994 · Touched by an Angel as Whit Russell
• 1994 · Touched by an Angel as George
• 1993 · Boy Meets World as George Feeny
• 1992 · Back to the Streets of San Francisco as Julius Burns
• 1991 · Clara as Detective Lieutenant Fine
• 1991 · The General Motors Playwrights Theater as Detective Lieutenant Fine
• 1990 · On Thin Ice: The Tai Babilonia Story as John Nicks
• 1989 · The Simpsons as KITT (voice)
• 1989 · Making a Case for Murder as Slaney
• 1989 · Her Alibi as Sam
• 1987 · The Little Match Girl as Haywood Dutton
• 1987 · Blind Date as Harold Bedford
• 1986 · The Princess Who Had Never Laughed as Narrator
• 1985 · Night of 100 Stars II as Self
• 1984 · Laugh Busters as KITT (voice)
• 1982 · St. Elsewhere as Mark Craig
• 1982 · Knight Rider: Knight of the Phoenix as KITT (voice)
• 1982 · Drop-Out Father as Draper Wright
• 1982 · Knight Rider as KITT (voice)
• 1982 · Faerie Tale Theatre as Narrator (voice)
• 1982 · Rooster as Dr. DeVega
• 1982 · Rehearsal for Murder as Walter Lamb
• 1981 · Reds as Julius Gerber
• 1981 · The Million Dollar Face as Henry Burns
• 1981 · All Night Long as Richard H. Copleston
• 1980 · Conquest of the Earth as Norman
• 1980 · Freebie and the Bean as Walter Cruikshank
• 1980 · Damien: The Leper Priest as Bishop Koeckemann
• 1980 · The Blue Lagoon as Arthur Lestrange
• 1980 · City in Fear as Freeman Stribling
• 1980 · Galactica 1980 as Norman Blore
• 1979 · Trapper John, M.D. as
• 1979 · Hart to Hart as Simon Richardson
• 1979 · Sunburn as Crawford
• 1979 · Blind Ambition as G. Gordon Liddy
• 1979 · Bleacher Bums as
• 1979 · The Rebels as John Adams
• 1979 · The Chinese Typewriter as C. Donald Devlin
• 1978 · Diff'rent Strokes as
• 1978 · Grandpa Goes to Washington as
• 1978 · Sergeant Matlovich vs. the U.S. Air Force as Father Veller
• 1978 · Big Bob Johnson and His Fantastic Speed Circus as Lawrence Stepwell III
• 1978 · The Bastard as Samuel Adams
• 1978 · The One and Only as Mr. Crawford
• 1977 · The Court-Martial of George Armstrong Custer as Major Marcus Reno
• 1977 · The Return of the Incredible Hulk as John Bonifant
• 1977 · The Incredible Hulk as Dr. John Bonifant
• 1977 · Killer on Board as Marshall Snowden
• 1977 · Oh, God! as George Summers
• 1977 · Soap as Heinrich Himmel
• 1977 · Black Sunday as Pugh
• 1976 · Quincy, M.E. as Paul Reardon
• 1976 · Quincy, M.E. as Dr. Charlie Volmer
• 1976 · The Nancy Walker Show as Kenneth Kitteridge
• 1976 · Francis Gary Powers: The True Story of the U-2 Spy Incident as Bissell
• 1976 · The Adams Chronicles as John Quincy Adams
• 1975 · Barbary Coast as Harry Boyle
• 1975 · Medical Story as Jeffrey Brody
• 1975 · One of Our Own as Dr. Moresby
• 1975 · Sarah T. - Portrait of a Teenage Alcoholic as Matt Hodges
• 1974 · Kolchak: The Night Stalker as Police Lt. Jack Matteo
• 1974 · The Rockford Files as Thomas Caine
• 1974 · The Rockford Files as Gary Bevins
• 1974 · The Parallax View as Austin Tucker
• 1974 · A Case of Rape as Leonard Alexander
• 1973 · Toma as
• 1973 · The Fabulous Doctor Fable as Elliot Borden
• 1973 · The Lie as Albert
• 1973 · Murdock's Gang as Roger Bates
• 1972 · 1776 as John Adams
• 1972 · The Bob Newhart Show as Edgar T. Vickers Jr.
• 1971 · McMillan & Wife as Commander Campbell
• 1971 · Cannon as
• 1970 · McCloud as
• 1969 · Marlowe as Mr. Cromwell
• 1968 · The Good Guys as
• 1968 · The Mod Squad as
• 1967 · The Graduate as Mr. Braddock
• 1967 · The President's Analyst as Wynn Quantrill
• 1967 · Judd, for the Defense as
• 1967 · Two for the Road as Howard Manchester
• 1967 · Ironside as
• 1967 · Captain Nice as Carter Nash
• 1966 · T.H.E. Cat as Tony Webb
• 1965 · A Thousand Clowns as Albert Amundsen
• 1963 · Ladybug Ladybug as Mr. Calkins
• 1961 · The Defenders as Malloy
• 1961 · The Defenders as Mike Herman
• 1958 · Naked City as Harry Culverin
• 1956 · Tony Awards as Self - Performer
• 1951 · Hallmark Hall of Fame as John Quincy Adams
• 1951 · Hallmark Hall of Fame as