Directed by
| Don Sharp | ... | (directed by) |
Writing Credits
| Ed Brennan | ... | (written by) & |
| Joseph Van Winkle | ... | (written by) |
| James Hannah Jr. | ... | (adaptation) (uncredited) |
| Don Sharp | ... | (adaptation) (uncredited) |
Cast (in credits order) complete, awaiting verification
| Christopher Lee | ... | Dr. Ian Mandeville | |
| Joan Collins | ... | Sarah Mandeville | |
| Herbert Lom | ... | Prescott | |
| Jane Birkin | ... | Alta | |
| Robert Hardy | ... | Edward Foster / Andrew Marr | |
| Jean Marsh | ... | Victoria | |
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Carleton Hobbs | ... | Old Marr |
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Roy Evans | ... | Baxter |
| Martin Boddey | ... | Sgt. Riley | |
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John Glyn-Jones | ... | Bank Manager (as John Glyn Jones) |
| John Levene | ... | Doctor | |
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Jennifer Thanisch | ... | Jessica |
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Michael McVey | ... | Francis |
| Barry Linehan | ... | Asylum Gatekeeper | |
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Linda Gray | ... | Woman on Hill |
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Lysandre De La Haye | ... | Child on Hill (as Lysandra De-La-Haye) |
| Earl Rhodes | ... | Child on Hill | |
Produced by
| James Hannah Jr. | ... | producer (produced by) |
Music by
| Wilfred Josephs | ||
Cinematography by
| Ernest Steward | ... | director of photography |
Editing by
| Teddy Darvas | ||
Art Direction by
| Geoffrey Tozer | ||
Makeup Department
| Helen Lennox | ... | hairdresser |
| Basil Newall | ... | makeup artist |
Production Management
| Frank Bevis | ... | production supervisor |
Second Unit Director or Assistant Director
| Barry Langley | ... | assistant director |
Art Department
| Pamela Cornell | ... | assistant art director |
Sound Department
| Laurie Clarkson | ... | sound recordist |
| Paddy Cunningham | ... | sound recordist (as Paddy Cuningham) |
| Pat Foster | ... | sound editor |
| Doug Smith | ... | sound recordist (uncredited) |
Camera and Electrical Department
| Dudley Lovell | ... | camera operator |
| George Boner | ... | best boy (uncredited) |
| Michael Browne | ... | gaffer (uncredited) |
Costume and Wardrobe Department
| Dorothy Edwards | ... | wardrobe |
Music Department
| Philip Martell | ... | conductor |
Script and Continuity Department
| Phyllis Townshend | ... | continuity |
