Directed by
| Martyn C. Webster | ||
Writing Credits
| Francis Durbridge | ... | (based on the television serial) |
| A.R. Rawlinson | ... | (screenplay) |
Cast (in credits order) verified as complete
| Robert Beatty | ... | Dr. Mark Fenton | |
| Elizabeth Sellars | ... | Della Freeman | |
| Peter Coke | ... | Detective Inspector George Bellamy | |
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Hugh Kelly | ... | Dr. Craig |
| Vida Hope | ... | Jackie Leroy | |
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Janet Butler | ... | Sister Rogers |
| Ferdy Mayne | ... | Charles Constance | |
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James Raglan | ... | Supt. Grayson |
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Hugh Pryse | ... | Mr. Rattray |
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George Benson | ... | Prescott |
| Roger Delgado | ... | Felix Galegos | |
| Rest of cast listed alphabetically: | |||
| Frank Atkinson | ... | Railway Ticket Clerk (uncredited) | |
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Donald Conlon | ... | Helios Restaurant Patron (uncredited) |
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Arthur Dibbs | ... | Helios Restaurant Patron (uncredited) |
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Robert Gregory | ... | Man at Northolt Airport (uncredited) |
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Jean Hardwicke | ... | Sister (uncredited) |
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Barry Johns | ... | Hospital Orderly (uncredited) |
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Anthony Lang | ... | Johnny (uncredited) |
| Ronald Leigh-Hunt | ... | Sgt. Lewis (uncredited) | |
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Richard Neller | ... | Hospital Visitor (uncredited) |
| Harold Sanderson | ... | Hospital Visitor (uncredited) | |
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Marc Sheldon | ... | Waiter (uncredited) |
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Toke Townley | ... | Fred Barker (uncredited) |
Produced by
| Ernest G. Roy | ... | producer |
Music by
| Wilfred Burns | ||
Cinematography by
| Gerald Gibbs | ... | director of photography |
Editing by
| Joseph Sterling | ||
Art Direction by
| Bernard Robinson | ||
Makeup Department
| Betty Lee | ... | hairdresser (as Bette Lee) |
| John O'Gorman | ... | principal makeup artist |
Production Management
| E.S. Laurie | ... | production manager |
Second Unit Director or Assistant Director
| Pat Kelly | ... | assistant director |
| Buddy Booth | ... | third assistant director (uncredited) |
Sound Department
| W.H. Lindop | ... | sound recordist (as W. Lindop) |
| Harry Raynham | ... | sound camera operator (uncredited) |
Camera and Electrical Department
| Noel Rowland | ... | camera work |
| Peter Lamb | ... | clapper loader (uncredited) |
Costume and Wardrobe Department
| Olive Swinney | ... | wardrobe |
Music Department
| Wilfred Burns | ... | conductor |
Script and Continuity Department
| Marjorie Owens | ... | continuity |
