Millard Mitchell as James T. Connie

Gilbert Roland as Punch Pinero

John Beal as Dr. Wilson aka Doc

Marshall Thompson as Blivens Scott

Alf Kjellin as Clem Randall

Harry Morgan as Dawson

Jay Adler as Steve Kopac

Regis Toomey as Dr. Gordon

Fay Roope as Warden George Potter

Carleton Young as Captain Haggarty

John Marley as Knotty Johnson

Russ Conway as Dr. Hughes

Byron Foulger as Dr. Brint, Dentist

Charles Bronson as Jocko

Jack Carr as Harry Higgins

Joe Haworth as Convict 9670

Dan Jackson as Convict 1538

Chester Jones as Convict 7546

Frank Mitchell as Convict 3007

Vincent Renno as Convict 9919

Paul Hoffman as Convict

Allen Mathews as Convict

George Eldredge as Convict

Dick Cogan as Convict

Peter Virgo as Convict

George Stern as Convict

Joe Palma as Convict Driver

Fred Kelsey as Store Detective

Grace Lenard as Waitress

Joe McTurk as Big Benny

Shirley Mills as Blonde Tilly

John Monaghan as Test Guard

Dick Curtis as Guard

Billy Nelson as Guard

Eddie Parker as Guard on Dump Truck

Barney Phillips as Baker Foreman

Carol Savage as Mrs. Randall

Harry Stanton as Banker

Charles Sullivan as Driscoll