Acting · born 1955 · Brooklyn, New York City, New York, USA
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.
Paradise: Disturbed
Date TBA
Relapse
Seymour · Date TBA
Path Lights
Father · Date TBA
A Great Depression
Date TBA
Day One
Date TBA
The Walking Dead
Gregory · 2010
Terminator 2: Judgment Day
Todd Voight · 1991
Kick-Ass
Detective Gigante · 2010
Taken
Stuart St. John · 2008
Heat
Ralph · 1995
Gattaca
Dr. Lamar · 1997
Allegiant
Phillip · 2016
Apollo 13
Henry Hurt · 1995
Transcendence
Dr. Thomas Casey · 2014
The Rock
Lonner (uncredited) · 1996
The Mentalist
Sheriff Thomas McAllister · 2008
Fracture
Judge Moran · 2007
A Few Good Men
Capt. Whitaker · 1992
Air Force One
Agent Gibbs · 1997
Shanghai Noon
Nathan Van Cleef · 2000
Solace
Mr. Ellis · 2015
Faster
Sergeant Mallory · 2010
Year One
King · 2009
24
George Mason · 2001
Candyman
Trevor Lyle · 1992
Leaving Las Vegas
Cynical Cabbie · 1995
Amistad
Hammond · 1997
CSI: Crime Scene Investigation
Rory Atwater · 2000
Universal Soldier: The Return
Dr. Dylan Cotner · 1999
