A husband-and-wife detective team look into the murder of one of her friends, whose father--a prominent scientist--has been kidnapped. They find themselves up against a sinister crime organization headed by a mysterious figure known only as "Z".
| Directing | Maclean Rogers | Director |
| Directing | Denis Johnson | Assistant Director |
| Writing | Francis Durbridge | Story |
| Writing | A.R. Rawlinson | Screenplay |
| Production | A.R. Rawlinson | Associate Producer |
| Production | Ernest G. Roy | Producer |
| Sound | Stanley Black | Music |
| Camera | Brendan J. Stafford | Director of Photography |
