| Person | Type | Job | Role(s) |
|---|---|---|---|
 Alan Rawsthorne | Crew | Sound | Original Music Composer |
André Hakim | Crew | Production | Producer |
Arthur Ibbetson | Crew | Camera | Camera Operator |
Basil Fenton-Smith | Crew | Sound | Sound Mixer |
Bob McNaught | Crew | Production | Associate Producer |
Ewen Montagu | Crew | Writing | Book |
 Gerry O'Hara | Crew | Directing | Assistant Director |
Harold Fletcher | Crew | Costume & Make-Up | Makeup Artist |
J.B. Smith | Crew | Sound | Sound Mixer |
 John Hawkesworth | Crew | Art | Art Direction |
Muir Mathieson | Crew | Sound | Conductor |
Nigel Balchin | Crew | Writing | Screenplay |
 Oswald Morris | Crew | Camera | Director of Photography |
Peter Taylor | Crew | Editing | Editor |
 Ronald Neame | Crew | Directing | Director |
Tom Howard | Crew | Visual Effects | Visual Effects |
Winston Ryder | Crew | Sound | Sound Editor |
Erica Masters | Crew | Directing | Assistant Director |
 Allan Cuthbertson | Cast | Actor | Vice-Admiral |
 André Morell | Cast | Actor | Sir Bernard Spilsbury |
 Brian Oulton | Cast | Actor | Wills Officer (uncredited) |
 Clifton Webb | Cast | Actor | Lt. Cmdr. Ewen Montagu |
 Cyril Cusack | Cast | Actor | Taxi Driver |
 Everley Gregg | Cast | Actress | Club Matron (uncredited) |
 Geoffrey Keen | Cast | Actor | Gen. Nye |
 Gibb McLaughlin | Cast | Actor | Porter |
 Gloria Grahame | Cast | Actress | Lucy Sherwood |
 Joan Hickson | Cast | Actress | Landlady |
 John Welsh | Cast | Actor | Bank Manager |
 Josephine Griffin | Cast | Actress | Pam |
 Laurence Naismith | Cast | Actor | Adm. Cross |
 Lloyd Lamble | Cast | Actor | Passport Officer (uncredited) |
 Michael Hordern | Cast | Actor | Gen. Coburn |
 Miles Malleson | Cast | Actor | Scientist |
 Moultrie Kelsall | Cast | Actor | The Father |
 Peter Sellers | Cast | Actor | Winston Churchill (voice) |
 Richard Wattis | Cast | Actor | Shop Assistant |
 Robert Brown | Cast | Actor | French |
 Robert Flemyng | Cast | Actor | Lt. George Acres |
 Ronald Adam | Cast | Actor | Adams |
 Stephen Boyd | Cast | Actor | Patrick O'Reilly |
 Terence Longdon | Cast | Actor | Larry |
 William Russell | Cast | Actor | Joe |
 William Squire | Cast | Actor | Lt. Jewell |
| Person | Type | Job | Role(s) |
