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Michael Jayston as Roger Masters |
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Nyree Dawn Porter as Laura |
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Barry Nelson as Hugo Fane |
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Thorley Walters as Dr. Ledworth |
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Richard Oldfield as Piers Fane |
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Janet Key as Lisa |
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Victor Winding as Detective Sergeant Rainer |
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Clare Sutcliffe as Betty |
| Writing | Terence Feely | Writer |
| Writing | Brian Clemens | Writer |
| Sound | Laurie Johnson | Music |
| Directing | Robert D. Cardona | Director |
| Production | John Sichel | Producer |
| Production | Cecil Clarke | Executive Producer |
| Editing | John Hawkins | Editor |
| Editing | Roy Jordan | Editor |
| Editing | Carole Legg | Editor |
| Editing | Jim Reeves | Editor |
| Production | Stanley Mills | Production Designer |
| Costume & Make-Up | Alyson Ritchie | Wardrobe Master |
| Costume & Make-Up | Sheila Mann | Makeup Artist |
| Sound | Bob Woodhouse | Sound |
| Camera | Dick Bayley | Camera Operator |
| Camera | Bill Brown | Camera Operator |
