Big House, U.S.A

Broderick Crawford

Rollo Lamar

Ralph Meeker

Geraldo 'Jerry' Barker aka Iceman

Reed Hadley

Special FBI Agent James Madden

William Talman

William 'Machine Gun' Mason

Lon Chaney Jr.

Leonard M. 'Alamo' Smith

Charles Bronson

Benny Kelly

Felicia Farr

Emily Euridice Evans

Roy Roberts

Chief Ranger Will Erickson

Willis Bouchey

Robertson Lambert

Peter J. Votrian

Danny Lambert

Robert Bray

Ranger McCormick

William Boyett

Ranger at Park Exit (uncredited)

Nelson Leigh

Madden's FBI Supervisor (uncredited)

Gregg Martell

Accomplice on Fishing Boat (uncredited)

Bill McLean

Dipsy (uncredited)

Jan Merlin

Tommy (uncredited)

Joe Ploski

Convict (uncredited)

Stafford Repp

Police Warden Machek (uncredited)

John C. Higgins

Screenplay

Howard W. Koch

Director

George W. George

Story

George F. Slavin

Story

Aubrey Schenck

Producer

Paul Dunlap

Original Music Composer

Gordon Avil

Director of Photography

John F. Schreyer

Editor