Peter O'Toole

Murphy

Siân Phillips

Hayden

Philippe Noiret

Brezan

Horst Janson

Lauchs

John Hallam

Ellis

Ingo Mogendorf

Voght

John Clifford

German Submarine Crewman (uncredited)

Harry Fielder

German Submarine Crewman (uncredited)

George Roubicek

German Submarine Crewman (uncredited)

Bob Simmons

German Submarine Crewman (uncredited)