Cast
Tutte Lemkow
Corporal
Rodney Bewes
Recruitment Interviewee (uncredited)
Dirk Bogarde
Dr. Simon Sparrow (uncredited)
Guy Standeven
American Naval Officer (uncredited)
Robin Hawdon
Williams
Esma Cannon
Consul's Wife
Andrew Cruickshank
Admiral Filmer
Lloyd Nolan
Vice Admiral Ryan
Sidney James
Dance Instructor
Paul Maxwell
Commander Spelling U.S.N.
Kenneth Griffith
Orator
John Phillips
Rear Admiral
Joan O'Brien
Lt. Carol Blair
Warren Mitchell
'Honest' Marcel
Jeremy Lloyd
The Midshipman/Dewberry
Michael Bentine
Psychologist
Brian Wilde
Petty Officer Gilors
Neil McCarthy
Sergeant
Graham Crowden
Naval Officer (uncredited)
David Warner
Sailor Painting Ship (uncredited)
Alexis Kanner
Garrett
Robert Nichols
Bill
Laurence Naismith
Admiral Blake
Walter Fitzgerald
Admiral Thomas
Dinsdale Landen
The Midshipman/Bowles
Andrew Sachs
Short-Changed US Seaman
Kenneth More
Lt. Cmdr. Robert Badger
Derek Fowlds
Carson
Ronald Leigh-Hunt
Commander R.N.
Richard Vernon
Government Official at Enquiry (uncredited)
John Le Mesurier
George Dewberry Sr.
Wanda Ventham
Dartmouth Girl
Mischa Auer
Colonel & President