Acting

—

1 episode

2014

5 episodes as George Feeny

2012

5 episodes as Craig Thomas

2010

1 episode as Self

2008

1 episode as Milton Brody

2006

2 episodes as Andrew Schmidt

2004		Kim Possible 1 episode as Robot Pilot (voice)
2004		The King of Queens 1 episode as Phillip Waldscott

2003

1 episode as George

2002

1 episode as Dr. Douglas

1998

2 episodes as KITT (voice)

1996		Touched by an Angel 1 episode as Whit Russell
1996		Maybe This Time 1 episode as George Feeny

1994

6 episodes as John Adams

1993

158 episodes as George Feeny

1986

1 episode as Narrator (voice)

1984

1 episode

1982		St. Elsewhere 137 episodes as Mark Craig
1982		Knight Rider 84 episodes as KITT (voice)
1982		Hart to Hart 1 episode

1981

1 episode

1980		Freebie and the Bean 9 episodes as Walter Cruikshank
1980		Quincy, M.E. 1 episode as Dr. Charlie Volmer
1980		Galactica 1980 2 episodes as Norman Blore

1979

4 episodes as G. Gordon Liddy

1978		Grandpa Goes to Washington 1 episode
1978		Soap 1 episode as Heinrich Himmel

1977		Hallmark Hall of Fame 1 episode
1977		The Incredible Hulk 1 episode as Dr. John Bonifant

1976		Quincy, M.E. 2 episodes as Paul Reardon
1976		The Rockford Files 1 episode as Gary Bevins 1 episode as Thomas Caine
1976		The Nancy Walker Show 12 episodes as Kenneth Kitteridge
1976		McMillan & Wife 1 episode as Commander Campbell
1976		The Adams Chronicles 13 episodes as John Quincy Adams

1975

1 episode as Harry Boyle

1974		Kolchak: The Night Stalker 1 episode as Police Lt. Jack Matteo
1974		Toma 2 episodes

1973		McCloud 2 episodes
1973		Ironside 1 episode

1972

1 episode

1971

1 episode as Self - Performer

1970

1 episode

1969

1 episode

1968

1 episode

1967

15 episodes as Carter Nash

1966

1 episode as Tony Webb

1964

1 episode as Mike Herman

1962		Naked City 1 episode as Harry Culverin
1962		The Defenders 1 episode as Malloy

1952

1 episode as John Quincy Adams

Directing

1984

1 episode … Director