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Tom Conway as Tom Martin |
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Michael Balfour as Barney |
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Honor Blackman as Paula Grant / Paula Jackson |
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Brian Worth as Johnny Matlock |
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Bruce Seton as Webb |
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Freddie Mills as Pat |
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Alexander Gauge as MacAllister |
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John Horsley as Michael Matlock |
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Paddy Webster as Diane Grant |
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John Colicos as First Kidnapper |
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Larry Taylor as Second Kidnapper |
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Arthur Lowe as Mitchell |
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Frederick Schrecker as Professor Dohlmann |
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Marianne Walla as Miss Freda Dohlmann |
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Russell Westwood as Berlin Man |
| Costume & Make-Up | Barbara Sutton | Hairstylist |
| Production | Clive Midwinter | Production Manager |
| Production | Robert S. Baker | Producer |
| Sound | George Burgess | Sound Recordist |
| Directing | Percy Hermes | Assistant Director |
| Production | Monty Berman | Producer |
| Directing | Gladys Reeve | Continuity |
| Costume & Make-Up | Jimmy Evans | Makeup Artist |
| Art | Norman G. Arnold | Art Direction |
| Editing | Anne Barker | Editor |
| Directing | Henry Cass | Director |
| Writing | Norman Hudis | Writer |
| Writing | Paddy Manning O'Brine | Story |
| Sound | Stanley Black | Original Music Composer |
| Camera | Desmond Davis | Camera Operator |
| Camera | Monty Berman | Director of Photography |
| Crew | Ronald Liles | Production Controller |
