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Ronald Hines as Guy Birkett |
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Petra Davies as Mary Birkett |
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Gay Hamilton as April Dorn |
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Peter Madden as Spelman |
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Timothy Bateson as Swanson |
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Fanny Carby as Miss Mitkin |
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Patrick Parnell as Waiter |
| Directing | Alan Cooke | Director |
| Writing | Frederik Pohl | Story |
| Production | Irene Shubik | Producer |
| Writing | David Campton | Adaptation |
| Writing | Michael Imison | Story Editor |
| Production | George Spenton-Foster | Associate Producer |
| Editing | Richard Sidwell | Editor |
| Art | William McCrow | Production Design |
| Sound | Chick Anthony | Sound |
| Visual Effects | Michealjohn Harris | Visual Effects Designer |
| Lighting | John Dixon | Lighting Director |
| Camera | Peter Hall | Camera Operator |
| Sound | Norman Kay | Theme Song Performance |
| Sound | Norman Percival | Original Music Composer |
