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 (uncredited)

Joe Di Reda

BMSN Robbins (uncredited)

Robert Boon

Chief Engineer

Doug McClure

Ens. Merry (uncredited)

Joe Brooks

German Soldier (uncredited)

George Ford

Officer (uncredited)