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