
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.

as Det. Hyde

as Clay Pollack
1990

as Sheriff Thomas McAllister
2008

as Det. Hyde
2005

as Rory Atwater
2000

as Dr. Bancroft
2005

as Gregory
2010

as George Mason
2001

as George Pagolis
2001

as Dr. Hodge
1993

as Gilad Pellaeon
2019

as Detective Wilson
1994

as Detective Curt Landry
2005
as Harris
2025
2026

2026

as Blackburn
2025

as Harris
2025

as Self
2024

as Frank Lloyd Wright (voice)
2024

as George Schultz
2024

as Maynard
2024

as Gordon
2023

as Charlie Hoge
2023

as Joel
2022

as Oliver
2022

as Michael Rand
2020

as Priest
2020

as Priest James
2019

as Mario Castelnuovo-Tedesco
2018

as Edwards
2018

as Uncle
2018

as Dr. Roberts
2017

as Mr. Milk
2017

as Artemis
2016

as Phillip
2016

as Mr. Ellis
2015

as Forrest Bobo
2015
as Det. Hyde
1 ep.

as Clay Pollack
1 episodes

as Sheriff Thomas McAllister
5 episodes

as Det. Hyde
1 episodes

as Rory Atwater
5 episodes

as Dr. Bancroft
1 episodes

as Gregory
15 episodes

as George Mason
27 episodes

as George Pagolis
1 episodes

as Dr. Hodge
1 episodes

as Gilad Pellaeon
1 episodes

as Detective Wilson
1 episodes

as Detective Curt Landry
1 episodes

as Franklin Hollis
1 episodes

as Buzz Whitehead
1 episodes

as Mitchell Slocombe
1 episodes

as Baker
1 episodes

as Marine
1 episodes

as Peter Lockwood
1 episodes

as A.D.A. Rex Swarthmore
1 episodes

as Tommy Lowell
2 episodes

as General John Acosta
1 episodes

as Maurice Hewitt
1 episodes

as Judge Hollingsworth
1 episodes

as Charles Monroe
2 episodes