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Anton Diffring as Dr. Erik Leichner |
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William Sylvester as Vince Warren |
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Justine Lord as Diane Graydon |
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Martin Miller as Schroeder |
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Tony Garnett as Brennan |
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Warren Mitchell as Chemist |
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Philip Locke as Foster |
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Jacqueline Jones as Vanessa Palmer |
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Geoffrey Palmer as Dr. Tanfield |
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Sylva Langová as Vivienne Leichner |
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Peter Howell as Inspector Macready |
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Oliver MacGreevy as Wilkinson |
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David Futcher as Whitehead |
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Clifford Earl as Sergeant |
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Derek Partridge as Detective |
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Fred Beauman as Policeman |
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Michael Moyer as Policeman |
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Roland Curram as Soldier |
| Directing | Norman Harrison | Director |
| Production | Jack Greenwood | Producer |
| Production | Ronnie Curtis | Casting Director |
| Writing | Arthur La Bern | Screenplay |
| Writing | Edgar Wallace | Original Story |
| Camera | James Wilson | Director of Photography |
| Editing | Derek Holding | Editor |
| Art | Peter Mullins | Art Direction |
| Costume & Make-Up | Pat McDermott | Hairdresser |
| Costume & Make-Up | Michael Morris | Makeup Artist |
| Production | Ron Fry | Production Manager |
| Directing | Ted Lewis | Assistant Director |
| Sound | Brian Blamey | Sound Editor |
| Sound | Sidney Rider | Sound Recordist |
| Camera | Noel Rowland | Camera Operator |
| Sound | Bernard Ebbinghouse | Original Music Composer |
