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