Detective Scobie Malone accepts a mission to fly to London to arrest Sir James Quentin, a high-level commissioner wanted down under for murder. But when Malone arrives, he finds that the amiable Quentin is not only the key in groundbreaking peace negotiations, but also the target of an assassin himself.
| Directing | Ralph Thomas | Director |
| Camera | Ernest Steward | Director of Photography |
| Sound | Georges Delerue | Original Music Composer |
| Editing | Ernest Hosler | Editor |
| Production | Betty E. Box | Producer |
| Writing | Wilfred Greatorex | Screenplay |
| Writing | Jon Cleary | Novel |
| Production | Selig J. Seligman | Executive Producer |
| Production | James H. Ware | Associate Producer |
| Art | Tony Woollard | Production Design |
| Costume & Make-Up | W.T. Partleton | Makeup Artist |
| Costume & Make-Up | Stella Rivers | Hairdresser |
| Costume & Make-Up | Geoffrey Rodway | Makeup Artist |
| Production | Donald Toms | Production Manager |
| Directing | Simon Relph | Assistant Director |
| Directing | Nicolas Hippisley-Coxe | Third Assistant Director |
| Art | Peter Young | Set Dresser |
| Sound | Gordon K. McCallum | Sound Recordist |
| Sound | Dudley Messenger | Sound Recordist |
| Sound | Don Sharpe | Sound Editor |
| Sound | Otto Snel | Sound Mixer |
| Camera | James Bawden | Camera Operator |
| Costume & Make-Up | Yvonne Caffin | Costume Coordinator |
| Directing | Gladys Goldsmith | Continuity |
