Biography
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.
Filmography50+ titles
The Ghost Trap
The Mandalorian
The Mentalist
Teen Titans
The X-Files
Criminal Minds
The West Wing
Ben 10: Ultimate Alien
Bones
Justice League
Batman Beyond
Terminator 2: Judgment Day
The Walking Dead
Gargoyles
Justified
The Batman
The Closer
Boston Legal
Heat
M*A*S*H
24
ER
Longmire
Superman: The Animated Series
The Outer Limits
FBI: Most Wanted
The Booth at the End
Batman: The Brave and the Bold
Law & Order: Criminal Intent
CSI: Crime Scene Investigation
Gattaca
Cook County
Medium
Apollo 13
A Few Good Men
Moonlighting
Miami Vice
The A-Team
Shot
12 Monkeys
Taken
Jericho
Star Wars: Tales of the Empire
MacGyver
Supergirl
Salem
Nikita
Fracture
Leaving Las Vegas
New York Undercover