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Gene Nelson as Mike Delaney |
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Faith Domergue as Jill Rabowski |
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Peter Arne as Dr. Stephen Rayner / Jarvis |
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Joseph Tomelty as Detective Inspector Cleary |
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Donald Gray as Robert Maitland |
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Vic Perry as Emmanuel Vasquo |
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Paul Hardtmuth as Dr. Bressler |
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Martin Wyldeck as Dr. Preston |
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Leonard Williams as Detective Sergeant Haines |
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Launce Maraschal as Editor (Alcott) |
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Barry MacKay as Inspector Hammond |
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Charles Hawtrey as Scruffy (office boy) |
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Mary Jones as Sister Brown |
| Production | Alec C. Snowden | Producer |
| Editing | Geoffrey Muller | Editor |
| Camera | A.T. Dinsdale | Director of Photography |
| Writing | Charles Eric Maine | Screenplay |
| Directing | Ken Hughes | Director |
| Art | George Haslam | Art Direction |
| Camera | Ron Robson | Camera Operator |
| Crew | Dick Smith | Sound Recordist |
| Costume & Make-Up | Jack Craig | Makeup Artist |
| Sound | Jim Groom | Sound Editor |
| Costume & Make-Up | June Robinson | Hairstylist |
| Directing | Ted Sturgis | Assistant Director |
| Directing | Denis Johnson | Assistant Director |
| Writing | Charles Eric Maine | Novel |
| Production | Jim O'Connolly | Production Manager |
| Directing | Marjorie Owens | Continuity |
| Sound | Ronald Abbott | Sound Recordist |
