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Sydney Tafler as Antonio Riccardi |
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Ronald Howard as Detective Inspector Carson |
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Katharine Blake as Maria Riccardi |
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John Hewer as Giuseppe Riccardi |
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June Rodney as Helen Garrett |
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Gerald Case as Detective Sgt. Stott |
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Gerald Case as Charlie |
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Reginald Dyson as Josef Meyerling |
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Martin Benson as Catesby |
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Sam Kydd as Bert |
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Ewen Solon as Fred |
| Sound | Dick Smith | Sound Recordist |
| Sound | Laurie Clarkson | Sound Recordist |
| Production | William H. Williams | Production Supervisor |
| Directing | Ted Holliday | Assistant Director |
| Production | George Mills | Production Manager |
| Camera | Robert LaPresle | Director of Photography |
| Directing | Betty Harley | Continuity |
| Costume & Make-Up | M.E. Gillett | Wardrobe Master |
| Costume & Make-Up | Jayne Seymour | Hairstylist |
| Writing | Rex Rienits | Writer |
| Production | Julian Wintle | Producer |
| Art | George Haslam | Art Direction |
| Directing | Michael McCarthy | Director |
| Editing | Eric Hodges | Editor |
| Costume & Make-Up | Jack Craig | Makeup Artist |
| Camera | Moray Grant | Camera Operator |
| Sound | Ronnie Emanuel | Original Music Composer |
