Spurred on by the death of his drug-addicted sister at the hands of ruthless narcotics kingpin Frank McNally, U.S. drug enforcement agent Charles Sturgis embarks on an investigation that takes him from New York to London, Lisbon, Rome, Naples and finally Athens in pursuit of McNally's shapely associate, Gina Broger.
| Writing | John Paxton | Screenplay |
| Editing | Richard Best | Editor |
| Sound | Richard Rodney Bennett | Original Music Composer |
| Camera | Ted Moore | Director of Photography |
| Directing | John Gilling | Director |
| Production | Albert R. Broccoli | Producer |
| Production | Phil C. Samuel | Associate Producer |
| Camera | Stanley Pavey | Second Unit Director of Photography |
| Writing | A.J. Forrest | Story |
| Art | Paul Sheriff | Art Direction |
| Directing | Bluey Hill | Assistant Director |
| Production | Irving Allen | Producer |
| Production | Cecil R. Foster Kemp | Production Supervisor |
| Directing | Olga Brook | Continuity |
| Sound | Len Shilton | Sound Recordist |
| Costume & Make-Up | Roy Ashton | Makeup Artist |
| Directing | Kay Rawlings | Continuity |
| Production | John Cabrera | Location Manager |
| Camera | Harold Haysom | Camera Operator |
| Production | Nora Roberts | Casting |
| Sound | Muir Mathieson | Conductor |
| Directing | Max Varnel | Second Unit Director |
| Camera | Skeets Kelly | Camera Operator |
| Sound | Norman Coggs | Sound Recordist |
| Directing | Alec Gibb | Assistant Director |
| Costume & Make-Up | Bill Griffiths | Hairdresser |
| Art | Maurice Fowler | Assistant Art Director |
| Art | Syd Cain | Assistant Art Director |
| Sound | Don Saunders | Sound Editor |
