Born in Brooklyn, New York City, New York, USA — Dec 16 1955
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.
Browse acting and crew credits across movies and TV — filter and sort to find specific roles.

Clay Pollack

Dr. Bancroft

Rory Atwater

Sheriff Thomas McAllister

Dr. Hodge

Det. Hyde

Gregory

George Mason

Detective Curt Landry

George Pagolis

Detective Wilson

Franklin Hollis

Baker

Mitchell Slocombe

A.D.A. Rex Swarthmore

Maurice Hewitt

Judge Hollingsworth

Marine

Buzz Whitehead

Peter Lockwood

Tommy Lowell

Neil Wojak

Gilad Pellaeon

Percy Rose

General John Acosta

Christopher Hawks

Jeremiah Rains

Barking Deer #2 (voice)

Scalper

Terry McCammon

(segment "Take My Life...Please!")

Tom

Charles Monroe

Sgt. Corey Mills (voice)

Dr. Childes (voice)

Hans (voice)

Mento / General Immortus (voice)

Maurice

Iago (Voice)

Dan Kowalski

Jonathan Foster

Warden Morgg / Trukk (voice)

Paul (voice)

Todd Voight

Dr Carl Weschler

Sinestro (voice)

John Smith (uncredited)

Harry Kellogg

Ray Spiotta

Lee Hackman

Ronnie 'Dogstick' Brannigan

Ralph

Liam McClean

General Brak / Soldier (voice)

Dr. Landru

Stuart St. John

Brett Bones

Manhunter / Paul Kirk (voice)


Magistrat Hale

Taxi Driver

Pro Shop Cashier (voice)

Lonner (uncredited)

Jeffrey

Capt. Whitaker

Detective Gigante

Henry Hurt

Gilad Pellaeon (voice)

Eric Fromby

Judge Moran

Christophe Nnngaarzh

Bernard

Alvin Simmons

Agent Gibbs

Dr. Lamar

Octopaganini (voice)

George Schultz

Phillip

Dr. Dylan Cotner

Sergeant Mallory

Mr. Ellis

Keith Nolan

Additional Voices (voice)

Dr. Thomas Casey

Nathan Van Cleef

Lt. Pierson

King

Blackburn

The Man

Arlen Pavich

Jimbo

Trevor Lyle

Bo Tyler

Clay Shelton

Cynical Cabbie

Self

Alexander Willis

Edwards

Greg

Christopher Crawford

Railroad Foreman

Dr. Kirk Langstrom (voice)

Blackwell

Byron Cole

Kent Sutcliffe

Gavreau

Gentry

Bowery Snax

Lieutenant Durgan

Priest

Lloyd

Uncle

John Barrows

Charlie Hoge

Joey Patterson

Moe

Captain Atom (voice)

Charlie's Friend

Mr. DeMarco

Evan Wantz

Rudy Mohr

Bo Tyler

Admiral Kentz

Ricky Fell

Waingro

Fast Eddie

Virgil Koster

Gus

Buzz Aldrin

Lt. Clyde Webber

Roberts, Vietnam

Date #4 (uncredited)

Mr. Frost

Harkness

Second Man

Male Interviewer

Chick

Sherman Carson

Tosh

Donald Falk

Harry Copeland

Dr. Roberts

Harvey Preston

Stark

Cardogan

Jack Torme

Preacher McMahon

Detective Carter


Detective

Jonathan

Yo-Yo

Connally

Yepihodov

Peter

Sonny

Russ Loring

Uncle Doug

Harold

Sunburned Man

Harris

Harry

Dad

Father De La Chasse

Michael Rand

Wayne

Peter Zenner

Dr. Lansen

Shakespeare

Hammond

James Blakemore

Danny “Figaretto” Evans

Gordon Shafer

Joey Szabo

Marchat

Self - (archive footage)

Mario Castelnuovo-Tedesco

McMahon


Dakar Johnston

J.D. Johnson

Gordon

John Patrick Earl
George

Fred O'Brien

Joel

Self

Artemis

Kenneth

Seymour

Tommy Tulip

Curtis Harrison

Peter Shepherd

Ryan

Uncle Jeff

Forrest Bobo

Priest James

Peter Keller

Oliver

Bruce MacNamara

Sid Harris
Doc Ruppert

Maynard

Frank Devore

Monty Griswold

Mr. Milk

Frank Lloyd Wright (voice)

Self

Ez Andy
