Alexander Harper Berkeley (born December 16, 1955) is an American actor. He is known for his television roles as Sheriff Thomas McAllister on the crime drama The Mentalist, George Mason on the political thriller series 24, Percy Rose on the action thriller series Nikita, the Man on The Booth At The End and Gregory in AMC's The Walking Dead. His notable film roles include Todd Voight in Terminator 2: Judgment Day, Agent Gibbs in Air Force One, Bowery Snax in Sid and Nancy, Dr. Lamar in Gattaca, Trevor Lyle in Candyman and Ralph in Heat.
2024
as Self
2024
as George Schultz
2024
as Gilad Pellaeon (voice)
2024
as Maynard
2023
as Gordon
2023
as Charlie Hoge
2022
as Joel
2022
2020
as Michael Rand
2020
as Priest
2020
as Mario Castelnuovo-Tedesco
2020
as Maurice Hewitt
2019
as Lee Hackman
2019
as Gilad Pellaeon
2019
as Priest James
2018
as Edwards
2018
as Uncle
2017
as Dr. Roberts
2017
as Mr. Milk
2016
as General John Acosta
2016
as Judge Hollingsworth
2016
as Artemis
2016
as Phillip
2015
as Peter Lockwood
2015
as Mr. Ellis
2015
as Ronnie 'Dogstick' Brannigan
2015
as Forrest Bobo
2015
as Jonathan Foster
2014
as Dr. Kirk Langstrom (voice)
2014
as Frank Devore
2014
as Magistrat Hale
2014
as Chick
2014
as Dr. Thomas Casey
2014
as Uncle Jeff
2013
as Kenneth
2013
as Dr. Lansen
2013
as Manhunter / Paul Kirk (voice)
2012
as Self
2012
as Jeremiah Rains
2012
2011
as Peter
2011
as Lieutenant Durgan
2011
as The Man
2011
as Moe
2011
as Liam McClean
2011
as Liam McLean
2010
as Detective Carter
2010
as Sergeant Mallory
2010
as Gregory
2010
as Percy Rose
2010
as McMahon
2010
as Warden Morgg / Trukk (voice)
2010
as Detective Gigante
2010
as Charles Monroe
2010
as Harry
2009
as Mr. Frost
2009
as Captain Atom (voice)
2009
as Father De La Chasse
2009
as King
2009
as Sonny
2009
as Dad
2009
as Sid Harris
2008
as Sinestro (voice)
2008
as Sheriff Thomas McAllister
2008
as Stuart St John
2007
as Judge Moran
2007
as Railroad Foreman
2006
2006
as John Smith (uncredited)
2006
as John Smith (voice)
2006
as Uncle Doug
2006
as Peter Shepherd
2005
as Det. Hyde
2005
as Dr. Bancroft
2005
as Detective Curt Landry
2005
as Gus
2005
as Harkness
2005
as Arlen Pavich
2005
as Mitchell Slocombe
2005
as Jonathan
2004
as Self
2004
as A.D.A. Rex Swarthmore
2004
as Paul (voice)
2004
as Admiral Kentz
2003
as Tommy Tulip
2003
2003
as Mento / General Immortus (voice)
2003
as Warp (voice)
2003
as Joey Patterson
2002
as Harry Kellogg
2002
2001
as General Brak / Soldier (voice)
2001
as General Brak / Dignitary / Soldier (voice)
2001
as Mr. DeMarco
2001
as George Mason
2001
as George Pagolis
2001
as Carl
2001
as Virgil Koster
2001
as Clay Shelton
2001
as Dakar Johnston
2000
as Rory Atwater
2000
as Nathan Van Cleef
2000
as Evan Wantz
1999
as Franklin Hollis
1999
as Dr. Dylan Cotner
1999
as Bo Tyler
1999
as Bo Tyler
1999
as Dr. Childes (voice)
1999
as Yepihodov
1998
as Gavreau
1998
as Lt. Clyde Webber
1998
as Barking Deer #2 (voice)
1998
as Stoat (voice)
1998
as J.D. Johnson
1998
as George
1997
as Male Interviewer
1997
as Hammond
1997
as Additional Voices (voice)
1997
as Dr. Lamar
1997
1997
as Secret Service Agent Gibbs
1997
1996
as Tosh
1996
as Buzz Aldrin
1996
as Date #4 (uncredited)
1996
as John Barrows
1996
as Gentry
1996
as Sgt. Corey Mills (voice)
1996
as Jimbo
1996
as Ryan
1996
as Lonner (uncredited)
1996
as Alexander Willis
1996
as Sunburned Man
1996
as Neil Wojak
1996
1996
as Donald Falk
1995
as Ralph
1995
as Cynical Cabbie
1995
1995
as Henry Hurt
1995
as Greg
1995
as Terry McCammon
1995
as Shakespeare
1994
1994
1994
as Second Man
1994
as Detective Wilson
1994
as Octopaganini (voice)
1994
1994
as Sherman Carson
1994
1994
as Joey Szabo
1993
as Russ Loring
1993
as Dr. Hodge
1993
as Brett Bones
1993
as Bernard
1993
as James Blakemore
1992
as Capt. Whitaker
1992
as Kozolowski
1992
as Trevor Lyle
1992
as Marchat
1992
as Peter Zenner
1992
as Harold
1991
as Roberts, Vietnam
1991
as Harvey Preston
1991
as Todd Voight
1991
as Wayne
1991
as Bruce MacNamara
1991
as Harry Copeland
1990
as Blackwell
1990
1990
as Clay Pollack
1990
as Lt. Pierson
1990
as Stark
1990
as Detective
1990
as Fast Eddie
1990
as John Patrick Earl
1990
as Monty Griswold
1990
as Jeffrey
1990
as Rudy Mohr
1989
as Lloyd
1989
as Waingro
1988
as Jack Torme
1988
as Ricky Fell
1988
as Cardogan
1988
as Ez Andy
1987
as Byron Cole
1987
1987
as Preacher McMahon
1986
as Yo-Yo
1986
as Bowery Snax
1985
1985
as Kent Sutcliffe
1985
as Scalper
1984
1983
as Baker
1983
as Sergeant Wilson
1982
as Dan Kowalski
1982
1982
as Connally
1982
1981
as Buzz Whitehead
1981
1981
as Christopher Crawford
1979
1977
1972
as Marine
as Harris
as Fred O'Brien