Trevor Howard
Captain Thompson
José Ferrer
Major Stringer
Anthony Newley
Marine Clarke
Victor Maddern
Sgt. Craig
Percy Herbert
Marine Lomas
David Lodge
Marine Ruddock
Peter Arne
Marine Stevens
Graham Stewart
Marine Booth
John Fabian
Marine Cooney
John Van Eyssen
Marine Bradley
Robert Desmond
Marine Todd
Walter Fitzgerald
Gestapo Comdt.
Karl Stepanek
Assistant Gestapo Officer
Dora Bryan
Myrtie
Beatrice Campbell
Mrs Ruddock
Sydney Tafler
Policeman
Christopher Lee
Submarine Commander Alan Grieves
Pat McGrath
Marine Bellamy (uncredited)