
Acting
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.
The Mentalist
2008

Oddities
Recluse

Rust
as Blackburn

No Address
as Harris

Reagan
as George Schultz

The Ghost Trap
as Maynard

Schindler Space Architect
as Frank Lloyd Wright (voice)

Americans with No Address
as Self

Butcher's Crossing
as Charlie Hoge

Heightened
as Gordon

Star Wars: Tales of the Empire
as Gilad Pellaeon (voice) · 1 ep.

FBI: Most Wanted
as Maurice Hewitt · 1 ep.

Dead Talk Live
as Self - Guest · 2 ep.

The Mandalorian
as Gilad Pellaeon · 1 ep.

Truth Be Told
as Lee Hackman · 7 ep.

MacGyver
as General John Acosta · 1 ep.

Bull
as Judge Hollingsworth · 1 ep.

Supergirl
as Peter Lockwood · 1 ep.

12 Monkeys
as Jonathan Foster · 3 ep.

Zoo
as Ronnie 'Dogstick' Brannigan · 4 ep.