William Holden
Capt. David Ross
Sophia Loren
Stella
Trevor Howard
Capt. Chris Ford
Bernard Lee
Cmdr. Wadlow
Oskar Homolka
Van Dam
Kieron Moore
Kane
Noel Purcell
Hotel Clerk
Bryan Forbes
Weaver
Beatrix Lehmann
Housekeeper
Rupert Davies
Baker
Russell Waters
Sparks
Sidney Vivian
Grogan
Irene Handl
Clerk
John Crawford
American Captain
Jameson Clark
English Captain
Guy Standeven
Policeman (uncredited)
Michael Caine
Seaman (uncredited)
Bart Allison
Seaman on W88 (uncredited)
Belita
Canteen Hostess (uncredited)
Pauline Chamberlain
Woman Dancing at Forces Centre (uncredited)
Keith Faulkner
Seaman on W88 (uncredited)
Renée Houston
Canteen Worker (uncredited)
Aileen Lewis
Woman With Baby in Air Raid Shelter (uncredited)
Richard Neller
Officer in Operations Room (uncredited)
Ernie Rice
Officer in Operations Room (uncredited)
Robert Rietti
Dubbing (voice) (uncredited)
John Tatham
Salvage Unit Captain (uncredited)
Reg Thomason
Soldier at Dance (uncredited)