

Cast & creator
Best known for The Tonight Show Starring Johnny Carson, NCIS, 24
William Joseph Devane (born September 5, 1937) is an American film, television and theater actor, known for his role as Greg Sumner on the primetime soap opera Knots Landing and as James Heller on the Fox serial drama 24, the role he reprised in Live Another Day. He is also known for his supporting roles in films such as McCabe & Mrs. Miller, Family Plot), Marathon Man, Rolling Thunder and Space Cowboys. Devane began his acting career with the New York Shakespeare Festival where he performed in 15 plays. In 1966, Devane portrayed Robert F. Kennedy in the Off-Broadway spoof MacBird. He gained acclaim for his role as President John F. Kennedy in a television docudrama about the Cuban Missile Crisis, The Missiles of October, and again when he played blacklisted radio personality John Henry Faulk in the Emmy Award-winning TV movie Fear on Trial. He is widely known for his ten years as the ambitious and hardnosed politician-turned-corporate titan Greg Sumner on Knots Landing. In 1994, Devane appeared as Al Capone in Lois & Clark: The New Adventures of Superman in an episode entitled "That Old Gang of Mine". He also had a recurring role on the CBS show Early Edition as the lead character's father. Devane appeared in the films McCabe & Mrs. Miller; Lady Liberty; Family Plot; Marathon Man; Rolling Thunder; Yanks; Testament; Timestalkers; Forgotten Sins; Exception to the Rule; Payback; Hollow Man and Space Cowboys. Devane has played members of the Presidential Cabinet on two evening dramas. In 2004, on The West Wing, he guest-starred as the Secretary of State and potential Vice-Presidential nominee. Devane appeared in several scenes with Martin Sheen; they also appeared together as President John F. Kennedy and his brother Robert, respectively, 30 years earlier in The Missiles of October. In 2005, he joined the cast of 24 as Secretary of Defense James Heller for seasons 4, 5 and 6.
Also known as: William Joseph Devane, Γουίλιαμ Ντιβέιν, ویلیام دیوان
85
film credits
36
television credits
119
1955–2022 · acting roles
6.4
average across scored titles
Signature credits
Across film & television
Showing 121 of 121 credits

Self
1962
Nicolas Mason
2003
James Heller
2001
General Mark Suveg
1993
Lewis Berryhill
1999
President Hayes
1997
Peters
2006
Greg Sumner
1979
Fallon
1969
Benjamin Parker
1994
Tom Wetherly
1982
Al Kordic
1967
Smiley
1967
Williams
2014
Al Capone
1993
Edward Grayson
2011
Bernie Hobson
1996
President
2012Self
1971
Dr. Ray Waltham
1969
Moss Stratton
1955
Whitney Vance
2022
Michael Davis
2006
Dean Sanderson Sr.
2015
William Devane
1995
Dr. Kramer
2000
Walter
2007
Carter
1999
Brady McKay
2000
Eugene Davis
2000
Greg Sumner
1997
Lou Della Rosa
1993
Billy Crumb
2006
Black Jack Bouvier
1991
David Prine
1973
Janeway
1976
President Henry Hayes
2008
Sgt. Milt Warden
1979
John Manly
1978
Lawyer
1971
Arthur Adamson
1976
Dr. Dix
2015
John
1979
Dr. Dix
2006

Gen. Hodges (voice) (uncredited)
2015
Dr. Dix
2009
Dr. Chatham
1990
Dr. Dix
2012
Sergeant Joseph Turk
1999
Tom Wetherly
1983
Dr. Dix
2007
Cal Brennan
2003
Self – Narrator
1997
The Judge
2002
Major Charles Rane
1977
Dr. Dix
2011
Dr. Dix
2010
Dutch Hines
2010
Jack Litman
1989
John F. Kennedy - US President
1974
Mayor Kirby T. Calo
1981
Asst. D.A. Jackson
1975
Self
1982
Ron Lake
2000
President John F. Kennedy
1974
Mike Leak
1977
Roy Warner, aka Steve Dupree
1979
Sheriff Jim Metts
1991
Capt. Bob Pearson
1995
Col. Charnley
1990
Pilot
1971
Jimmy Pilgrim
1971
Scott McKenzie
1987
Jock Fenner
1971
Leonard Doc Blach
2014
Older Sam Ryan
2000Frank Carson
2009
Daniel 'Dan' Fields
1993
Nick Caldwell
1995
Lt. Barrett
1994
Tom
1994
Roger Thornhill
2001
Aaron Charney
1984
Pop O'Hara
2012
Thompson
2010
Lawrence Kellerman
1997
Maj. Phil Clark
1981Alan Beckett
2009
Big Red
2014
Self
2001
Tom Kincaid
2001
Alex Brandt
1990

Writer
1976
Everett Morgan Gray
2011
Kilburn
1973Dr. Karl Sorenson
1997
Earl Stokey
1973
Harry Langford
1981

LT. Ashley
1972
Elliot McSwain
1992
Ed Bledsoe
1992
Harry Orwitz
1993
George Boyajian
2002
Host & Narrator
1992
Frank Brolen
1977
Emmett Hunter
1997
Jake
2011
Tom
1971
Additional Dialogue
1971
Dr. Richard Ofshe
1996
Dr. Harbuck
1995judge Stanley Seeban
2009
Col. Weldon
2002

Coach Ball
1983
William Quinn
1983
John Henry Faulk
1975
Grove McCarthy
2004