An American insurance investigator is sent to Rhodesia to investigate the mysterious death of a diamond broker who drowned whilst diving off the coast. The broker was insured for $1 million so the insurers are suspicious.
| Directing | George Marshall | Director |
| Writing | Samuel Marx | Writer |
| Writing | T. J. Morrison | Writer |
| Production | Marcel Hellman | Producer |
| Editing | Edward B. Jarvis | Editor |
| Art | Terence Verity | Art Direction |
| Camera | Erwin Hillier | Director of Photography |
| Sound | Mischa Spoliansky | Original Music Composer |
| Writing | S.K. Kennedy | Story |
| Directing | Thelma Orr | Script Supervisor |
| Sound | Louis Levy | Music Director |
| Camera | Norman Warwick | Camera Operator |
| Camera | George Higgins | Still Photographer |
| Costume & Make-Up | Jean Bear | Hairstylist |
| Costume & Make-Up | Nell Taylor | Makeup Artist |
| Art | Peter Glazier | Assistant Art Director |
| Sound | Harold V. King | Recording Supervision |
| Production | G.R. Mitchell | Production Manager |
| Directing | Roger Good | Assistant Director |
| Directing | Tony Kelly | Assistant Director |
| Directing | Jeremy Summers | Third Assistant Director |
| Sound | Les Hammond | Sound Recordist |