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Andrew Ray as Klaus Fuchs |
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Michael Craig as Bruno Pontecorvo |
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Ray Smith as Doctor Cockcroft |
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Peter Jeffrey as Major Phillips |
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John Franklyn-Robbins as Skardon |
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Edward Wilson as Alan Nunn May |
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Antony Carrick as Commander Burt |
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Sandra Payne as Marianne Pontecorvo |
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Victoria Fairbrother as Betty |
| Directing | Alan Gibson | Director |
| Writing | Ian Curteis | Writer |
| Production | John Rosenberg | Producer |
| Production | John Woolf | Executive Producer |
| Art | Alan Pickford | Production Design |
