Robert Mitchum

Capt. Murrell

Curd Jürgens

Kapitän von Stolberg

David Hedison

Lt. Ware

Theodore Bikel

Heinie Schwaffer

Russell Collins

Doctor

Kurt Kreuger

Von Holem (uncredited)

Frank Albertson

Lt. J.G. Crain

Biff Elliot

Quartermaster

Michael McHale

German Soldier

Alan Dexter

Lt. Mackeson

Joe Di Reda

BMSN Robbins

Robert Boon

Chief Engineer

Doug McClure

Ens. Merry (uncredited)

Joe Brooks

German Soldier

George Ford

Officer (uncredited)

Sasha Harden

German Sailor

Ralph Manza

Lt. Bonelli (uncredited)

Gordon Mitchell

German Sailor

Marco López

Soldier (uncredited)

Vince Deadrick Sr.

American Sailor (uncredited)

Marco Lopez

Soldier (uncredited)

Hans Moebus

Sailor (uncredited)

Ralph Reed

Fireman (uncredited)