Clifton Webb
Lt. Cmdr. Ewen Montagu
Gloria Grahame
Lucy Sherwood
Robert Flemyng
Lt. George Acres
Josephine Griffin
Pam
Stephen Boyd
Patrick O'Reilly
Laurence Naismith
Adm. Cross
Geoffrey Keen
Gen. Nye
Moultrie Kelsall
The Father
Cyril Cusack
Taxi Driver
André Morell
Sir Bernard Spilsbury
Michael Hordern
Gen. Coburn
Allan Cuthbertson
Vice-Admiral
Joan Hickson
Landlady
Terence Longdon
Larry
Gibb McLaughlin
Porter
Miles Malleson
Scientist
William Russell
Joe
William Squire
Lt. Jewell
Richard Wattis
Shop Assistant
Ronald Adam
Adams
Robert Brown
French
Everley Gregg
Club Matron (uncredited)
Lloyd Lamble
Passport Officer (uncredited)
Brian Oulton
Wills Officer (uncredited)
John Welsh
Bank Manager
Peter Sellers
Winston Churchill (voice)
