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Dennis Price as Clive Hunter |
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Jack Hawkins as Pieter Brandt |
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Siobhán McKenna as Anne Hunter |
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Peter Hammond as Hendrik van Thaal |
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Grégoire Aslan as Dominic |
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Charles Paton as Barman |
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Bernard Lee as O'Connell |
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Ronald Adam as Van Thaal |
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Martin Boddey as Chief Engineer |
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Philip Ray as 1st Man Restaurant |
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Walter Horsbrugh as 2nd Man Restaurant |
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Cyril Chamberlain as Waiter |
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Dido Plumb as Bar Patron |
| Production | Aubrey Baring | Producer |
| Production | Maxwell Setton | Producer |
| Directing | David MacDonald | Director |
| Directing | Don Weeks | Assistant Director |
| Editing | Vladimir Sagovsky | Editor |
| Directing | David Peers | Assistant Director |
| Sound | Gordon K. McCallum | Sound mixer |
| Costume & Make-Up | Jim Hydes | Makeup Artist |
| Sound | Cedric Thorpe Davie | Music |
| Camera | Arthur Ibbetson | Camera Operator |
| Sound | C. C. Stevens | Sound mixer |
| Writing | Robert Westerby | Screenplay |
| Writing | Robert Westerby | Story |
| Camera | Oswald Morris | Director of Photography |
