Marlon Brando

Character: Robert Crain

Yul Brynner

Character: Captain Müller

Janet Margolin

Character: Esther

Trevor Howard

Character: Colonel Statter

Martin Benrath

Character: Kruse

Hans Christian Blech

Character: Donkeyman

Wally Cox

Character: Dr. Ambach

Max Haufler

Character: Branner

Rainer Penkert

Character: Milkereit

William Redfield

Character: Baldwin

Oscar Beregi Jr.

Character: Admiral (as Oscar Beregi)

Martin Brandt

Character: Nissen

Charles De Vries

Character: Kurz

Carl Esmond

Character: Busch

Martin Kosleck

Character: Wilke

Norbert Schiller

Character: Steward

Rick Traeger

Character: Schultz

Ivan Triesault

Character: Lt. Brandt

Robert Sorrells

Character: Koeniger

Eric Braeden

Character: Radio Officer (uncredited)

Frank London

Character: Merchant Marine (uncredited)

Jim Goodwin

Character: Merchant Marine (uncredited)

Gregg Barton

Character: Merchant Marine (uncredited)

Paul Baxley

Character: Crew Member (uncredited)

Hal Bokar

Character: Merchant Marine (uncredited)

Heinz Brinkmann

Character: Crew Member (uncredited)

Gene Dynarski

Character: Merchant Marine (uncredited)

Harold Dyrenforth

Character: Cornelson, Ingo Navigator (uncredited)

Horst Ebersberg

Character: Crew Member (uncredited)

Fritz Ford

Character: Crew Member (uncredited)

Harold Goodwin

Character: Merchant Marine (uncredited)

Sam Javis

Character: Merchant Marine (uncredited)

Roy Jenson

Character: Merchant Marine (uncredited)

Buck Kartalian

Character: Merchant Marine (uncredited)

Robert Kino

Character: Capt. Hatsuma (uncredited)

Manfred Lating

Character: Lutz (uncredited)