
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 Skip

as William

as Harris

as Blackburn

as Self

as Frank Lloyd Wright (voice)

as George Schultz

as Maynard

as Gordon

as Charlie Hoge

as Joel

as Oliver

as Michael Rand

as Priest

as Priest James

as Mario Castelnuovo-Tedesco

as Edwards

as Uncle

as Dr. Roberts

as Mr. Milk

as Artemis

as Phillip

as Mr. Ellis

as Forrest Bobo

as Dr. Kirk Langstrom (voice)

as Frank Devore

as Chick

as Dr. Thomas Casey

as Gordon Shafer

as Uncle Jeff

as Kenneth

as Dr. Lansen

as Peter Keller

as Peter

as H1ghway_man

as Lieutenant Durgan

as Moe

as Detective Carter

as Sergeant Mallory

as McMahon

as Detective Gigante

as Harry

as Mr. Frost

as Captain Atom (voice)

as Father De La Chasse

as King

as Sonny

as Dad

as Sid Harris

as Fred O'Brien

as Stuart St. John

as Judge Moran

as Railroad Foreman

as Doc Ruppert

as Uncle Doug

as Peter Shepherd

as Gus

as Harkness

as Arlen Pavich

as Jonathan

as Admiral Kentz

as Tommy Tulip

as Joey Patterson

as Mr. DeMarco

as Virgil Koster

as Dakar Johnston

as Nathan Van Cleef

as Evan Wantz

as Dr. Dylan Cotner

as Bo Tyler

as Yepihodov

as Gavreau

as Lt. Clyde Webber

as J.D. Johnson

as George

as Male Interviewer (voice)

as Hammond

as Charlie's Friend

as Agent Gibbs

as Dr. Lamar

as Danny “Figaretto” Evans

as Tosh

as Buzz Aldrin

as Date #4 (uncredited)

as John Barrows

as Gentry

as Ryan

as Lonner (uncredited)

as Alexander Willis

as Donald Falk

as Sunburned Man

as Curtis Harrison

as Ralph

as Cynical Cabbie

as Henry Hurt

as Greg

as Shakespeare

as Second Man

as Sherman Carson

as Joey Szabo

as Russ Loring

as James Blakemore

as Capt. Whitaker

as Kozolowski

as Trevor Lyle

as Marchat

as Peter Zenner

as Harold

as Roberts, Vietnam

as Harvey Preston

as Todd Voight

as Wayne

as Bruce MacNamara

as Harry Copeland

as Blackwell

as Lt. Pierson

as Stark

as Detective

as Fast Eddie

as John Patrick Earl

as Monty Griswold

as Rudy Mohr

as Lloyd

as Waingro

as Jack Torme

as Ricky Fell

as Cardogan

as Ez Andy

as Byron Cole

as Preacher McMahon

as Yo-Yo

as Bowery Snax

as Kent Sutcliffe

as Connally

as Christopher Crawford

as Seymour

as Father