Trailer
Images
 | Laurence Harvey as Lieutenant "Buster" Crabb, R.N.V.R. |
 | Michael Craig as Leading Seaman Knowles |
 | Dawn Addams as Third Officer Jill Masters, W.R.N.S |
 | John Clements as The Admiral |
 | Sidney James as Chief Petty Officer Thorpe |
 | Alec McCowen as Able Seaman Morgan |
 | Nigel Stock as Able Seaman Fraser |
 | Ian Whittaker as Ordinary Seaman Thomas |
 | Arnoldo Foà as Tomolino |
 | Gianna Maria Canale as Conchita |
 | Massimo Serato as Forzenelli |
 | Giacomo Rossi Stuart as Rosati |
 | Carlo Giustini as Fellini |
 | Raymond Young as Celloni |
 | David Lodge as Sergeant |
 | Ewen Solon as Willowdale Captain |
 | Brian Oulton as Holford |
 | Howard Marion-Crawford as Wing Commander |
 | Cyril Shaps as Miguel |
 | Lee Montague as Miguel's Mate |
 | John Lee as Flag Lt. |
 | Terence Longdon as Lt Bailey |
 | Ian MacNaughton as Admiralty Sentry |
 | Alan Webb as British Consul |
| John Moffatt as Diver |
| Harold Siddons as Army Interrogation Officer |
| Michael Brill as Naval Interrogation Officer |
 | Jack May as Navy Doctor |
 | Derren Nesbitt as Patrol Boat Officer |
 | Yvonne Romain as Spanish Girl |
 | Jerome Willis as Sailor |
| Writing | |
| William Fairchild | Screenplay |
| Marshall Pugh | Novel |
Directing | |
| William Fairchild | Director |
Crew | |
| Otto Heller | Cinematography |
Production | |
| Bertram Ostrer | Producer |
Editing | |
| Alan Osbiston | Editor |
Sound | |
| William Alwyn | Music |
Camera | |
| Ray Hearne | Still Photographer |
