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Jeanette Sterke as Mary Winston |
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Alan MacNaughtan as John Cleeve |
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Robert Brown as Richard Harrison |
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Jane Griffiths as Jane Winston |
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John Miller as Sir Harry Osmonde |
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Basil Henson as Derreck Alwyn |
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Anne Lawson as Sally Carter |
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Diane Clare as Selena Osmonde |
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Llewellyn Rees as Bradshaw |
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Dorothea Rundle as Martha Bradshaw |
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Hamilton Dyce as Det. Insp. Ames |
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Henry McCarty as Dr. Leighton |
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Tony Wall as Logan |
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Patrick Parnell as Cooper |
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Arlette Dobson as Karen |
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David Charlesworth as Charles |
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Brian Grellis as Delivery Boy |
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Ron Eagleton as Porter |
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Derek Sumner as Policeman |
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Thelma Holt as Marie |
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Jannie Talley as Patsy |
| Writing | Lindsay Galloway | Screenplay |
| Writing | John Roddick | Screenplay |
| Writing | Edgar Wallace | Novel |
| Directing | Lionel Harris | Director |
| Directing | Maurice Gibson | Assistant Director |
| Camera | James Wilson | Director of Photography |
| Production | Jack Greenwood | Producer |
| Sound | Bernard Ebbinghouse | Music |
| Production | Ronnie Curtis | Casting Director |
| Art | Peter Mullins | Art Direction |
| Costume & Make-Up | Hilda Fox | Hairdresser |
| Costume & Make-Up | Michael Morris | Makeup Artist |
| Production | Ron Fry | Production Manager |
| Sound | Roy Norman | Sound Editor |
| Sound | Sidney Rider | Sound Recordist |
| Sound | Eric Stockl | Sound Recordist |
| Camera | Peter Allwork | Camera Operator |
| Costume & Make-Up | Eileen Welch | Wardrobe Master |
