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Richard Denning as Major Gregory Keen |
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Carole Mathews as Hedy Bergner |
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Ronald Adam as Scammel / Dumetrius |
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Danny Green as Yotti Blum |
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Brian Worth as Capt. Peter Ridgeway |
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Hugh Moxey as Sgt. Tom Coutts |
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Peter Swanwick as Monsieur Paul Bonnet |
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Elwyn Brook-Jones as Digby Mitchel |
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Ronald Leigh-Hunt as Col. Julian Fentriss, M.I.5. |
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Robert Vincent O'Neil as Capt. Hank Godowski |
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Paul Hardtmuth as Dr. Buchmann |
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Bill Nagy as Marzotti |
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Alex Gallier as Max Rubenstein |
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Robert Crewdson as Control Officer |
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Jimmy Cains as Gassner |
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Edward Forsyth as German Policeman |
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Theodore Wilhelm as German Thug |
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Robert Bruce as Staff Officer |
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Jan Holden as Sally Jennings |
| Production | Richard Gordon | Co-Producer |
| Production | William G. Chalmers | Producer |
| Directing | Maclean Rogers | Director |
| Writing | Lindsay Hardy | Novel |
| Writing | Maclean Rogers | Writer |
| Art | John Stoll | Art Direction |
| Editing | Peter Mayhew | Editor |
| Camera | Ernest Palmer | Director of Photography |
| Production | Clive Midwinter | Production Manager |
| Directing | Don Weeks | Assistant Director |
| Sound | Wilfred Burns | Original Music Composer |
| Sound | Aubrey Lewis | Sound |
