Full Credits
26 members

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
Voice of Winston Churchill (uncredited)
18 members
Ronald Neame
Director
Gerry O'Hara
Assistant Director
Erica Masters
Assistant Director
Nigel Balchin
Screenplay
Ewen Montagu
Book
Bob McNaught
Associate Producer
André Hakim
Producer
Oswald Morris
Director of Photography
Arthur Ibbetson
Camera Operator
Alan Rawsthorne
Original Music Composer
Winston Ryder
Sound Editor
Basil Fenton-Smith
Sound Mixer
Muir Mathieson
Conductor
J.B. Smith
Sound Mixer
John Hawkesworth
Art Direction
Harold Fletcher
Makeup Artist
Tom Howard
Visual Effects
Peter Taylor
Editor