Acting

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1 episode

2025

1 episode as Jonathan Ashford

2024

1 episode as Self

2023

1 episode

2021

1 episode as Self - Guest

2018

6 episodes as Narrator (voice)

2017

6 episodes as Narrator (voice)

2015		Grace and Frankie 94 episodes as Robert Hanson
2015		Last Week Tonight with John Oliver 1 episode as Self

2012		Honest Trailers 1 episode as Ben Parker (archive footage)
2012		Anger Management 19 episodes as Martin Goodson
2012		The Colbert Report 1 episode
2012		Who Do You Think You Are? 1 episode as Self

2011

1 episode as Self

2009		Söndagsparty med Filip & Fredrik 1 episode
2009		The Friday Night Project 1 episode as Self - Host

2008

1 episode as Self

2007

1 episode as Radio Host

2006		America's Game: The Super Bowl Champions 4 episodes as Narrator (voice)
2006		10 Days That Unexpectedly Changed America 1 episode

2005

1 episode as Harvey

2004

4 episodes as Self

2003		Celebrity Poker Showdown 1 episode as Self
2003		The View 2 episodes as Self
2003		E! True Hollywood Story 2 episodes
2003		Inside the Actors Studio 1 episode as Self
2003		The Perilous Fight: America's World War II in Color 4 episodes as Narrator
2003		Golden Globe Awards 1 episode as Self

2002		Saturday Night Live 1 episode as Self - Cameo (uncredited)
2002		Spin City 1 episode as Ray Harris / Ray Crawford
2002		Golden Globe Awards 1 episode as Self - Nominee/Presenter

2001

2 episodes

1999		The West Wing 154 episodes as President Josiah Bartlet
1999		Chicken Soup for the Soul 23 episodes
1999		Nature 1 episode as Narrator (voice)
1999		Total Recall 2070 1 episode

1997		The Simpsons 1 episode as Real Seymour Skinner (voice)
1997		Gun 6 episodes as Van Guinness

1996

1 episode as Self - Guest

1994

26 episodes as Narrator

1993		A Matter of Justice 2 episodes
1993		Tales from the Crypt 1 episode as Kraygen / Thomas Miller / Zorbin the Magnificent
1993		Late Night with Conan O'Brien 3 episodes as Self - Guest
1993		Alex Haley's Queen 3 episodes as James Jackson Sr.

1990

11 episodes as Sly Sludge (voice)

1985		The New Alfred Hitchcock Presents 1 episode as Paul Dano
1985		Spaceflight 4 episodes
1985		The Atlanta Child Murders 2 episodes as Chet Dettlinger

1984

2 episodes as Self - Winner

1983

3 episodes as John F. Kennedy

1980

1 episode as Self - Nominee

1979		Saturday Night Live 1 episode as Self - Host
1979		Blind Ambition 4 episodes as John Dean

1978

1 episode as Taxi Driver

1974

2 episodes as Atty. Gen. Robert F. Kennedy

1973		Medical Center 1 episode as Glen
1973		Toma 1 episode as Eddie Siatti
1973		Love Story (US) 12 episodes as Frank Randolph
1973		Columbo 1 episode as Karl Lessing
1973		The Streets of San Francisco 1 episode
1973		Love, American Style 1 episode as Dr. Art Parmel
1973		The Rookies 1 episode
1973		The F.B.I. 1 episode as Neil Harland
1973		Ghost Story 1 episode as Frank

1972		Mannix 1 episode
1972		The F.B.I. 1 episode as Steve Chandler
1972		Cannon 3 episodes

1971		The Mod Squad 1 episode as Danny Morgan
1971		Sarge 14 episodes as Dan
1971		Dan August 1 episode as Norman Sayles

1970		Hawaii Five-O 1 episode as Arthur Dixon 1 episode as Eddie Calhao
1970		Matt Lincoln 17 episodes as Charles
1970		Ironside 1 episode as Johnny
1970		The Young Lawyers 24 episodes as Reverend Jimmy Haines
1970		The F.B.I. 1 episode as Perry Victor

1969		Lancer 1 episode
1969		Mission: Impossible 1 episode as Lieutenant Albert Brocke

1968

1 episode as Norman Gretzler

1967

1 episode as Phil Adams

1966

17 episodes as Peter Janus

1965

13 episodes as Louis Cahane

1964

1 episode as Adam Novins 1 episode as Joey Americus

1963		The Outer Limits 1 episode as Pvt. Arthur Dix
1963		Arrest and Trial 1 episode

1962		Naked City 1 episode as Counterman 1 episode as Nick (uncredited) 1 episode as Phillip Kosnik
1962		The Nurses 98 episodes as Saunders 98 episodes as Carl
1962		The Defenders 1 episode as Dino Locatelli

1961		Route 66 1 episode
1961		The Defenders 1 episode as Arnold McCabe

1960		Insight 128 episodes as Vincent 128 episodes as Akardin 128 episodes as God 128 episodes as Bobo 128 episodes as Jamie Conklin
1960		Police Surgeon 12 episodes as Ben Grover

1956

305 episodes as Roy Sanders