cast
- Christopher Lee
- Dr. Mandeville
- Joan Collins
- Sarah Mandeville
- Jennifer Thanisch
- Jessica
- Barry Linehan
- Gatekeeper
- Michael McVey
- Francis marr
- Jane Birkin
- Alta
- Herbert Lom
- Prescott
- Martin Boddey
- Police Sergeant
- Earl Rhodes
- Child on Hill
- John Glyn-Jones
- Bank Manager
- Jean Marsh
- Victoria Marr
- Roy Evans
- Baxter
- Carleton Hobbs
- Old Marr
- Robert Hardy
- Edward/Andrew
- Linda Gray
- Woman on Hill
crew
- Don Sharp
- Director
- James Hannah Jr.
- Producer
- Ed Brennan
- Screenwriter
- Joseph Van Winkle
- Screenwriter
- Ernest W. Steward
- Cinematographer
- Ernie Stewart
- Cinematographer
- Wilfred Josephs
- Composer (Music Score)
- Teddy Darvas
- Editor
- Geoffrey Tozer
- Art Director
- Barry Langley
- First Assistant Director
