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John Stuart as Inspector Webb |
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Olga Lindo as Mrs. Robson |
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Howard Marion-Crawford as Sgt. Clapper |
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Louise Lord as Anne Horder |
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Ronald Adam as Caleb Horder |
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John Varley as Peter Robson |
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Cyril Conway as Philip Grahame |
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Jock McKay as Angus |
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Barbara Madock as Toni |
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Jean Short as Lucy |
| Camera | Bryan Langley | Director of Photography |
| Production | Mario Zampi | Producer |
| Art | C.P. Norman | Art Direction |
| Sound | Charles T. Parkhouse | Sound Recordist |
| Camera | Drummond Drury | Camera Operator |
| Directing | Mario Zampi | Director |
| Sound | Giulio Zampi | Sound Effects |
| Directing | Kathleen Connors | Continuity |
| Editing | Giulio Zampi | Editor |
| Directing | Donald Wynne | Assistant Director |
| Writing | Walter C. Mycroft | Writer |
