Directed by
| Curtis Harrington | ||
Writing Credits
| David D. Osborn | ... | (original screen story) (as David Osborn) |
| Robert Blees | ... | (screenplay) and |
| Jimmy Sangster | ... | (screenplay) (as James Sangster) |
| Gavin Lambert | ... | (additional dialogue) |
Cast (in credits order) complete, awaiting verification
| Shelley Winters | ... | Mrs. Forrest | |
| Mark Lester | ... | Christopher Coombs | |
| Chloe Franks | ... | Katy Coombs | |
| Ralph Richardson | ... | Mr. Benton | |
| Lionel Jeffries | ... | Inspector Ralph Willoughby | |
| Hugh Griffith | ... | Mr. Harrison (The Pigman) | |
| Rosalie Crutchley | ... | Miss Henley | |
 |
Pat Heywood | ... | Dr. Mason |
| Judy Cornwell | ... | Clarine | |
| Michael Gothard | ... | Albie | |
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Jackie Cowper | ... | Angela Barnes (as Jacqueline Cowper) |
| Richard Beaumont | ... | Peter Brookshire | |
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Charlotte Sayce | ... | Katharine Forrest |
| Marianne Stone | ... | Miss Wilcox | |
| Rest of cast listed alphabetically: | |||
| Dorian Healy | ... | Reggie Pike (uncredited) | |
Produced by
| Samuel Z. Arkoff | ... | producer |
| David Hemmings | ... | producer (uncredited) |
| Louis M. Heyward | ... | executive producer |
| James H. Nicholson | ... | producer |
| John Pellatt | ... | associate producer |
| Jimmy Sangster | ... | producer (uncredited) |
Music by
| Kenneth V. Jones | ||
Cinematography by
| Desmond Dickinson | ... | director of photography |
Editing by
| Tristam Cones | ||
Casting By
| Sally Nicholl | ||
Art Direction by
| George Provis | ||
Makeup Department
| Sylvia Croft | ... | makeup artist |
| Joyce James | ... | hairdresser |
| Eddie Knight | ... | makeup artist |
| Pat McDermott | ... | hairdresser |
Production Management
| Donald Toms | ... | production manager |
Second Unit Director or Assistant Director
| Colin M. Brewer | ... | assistant director (as Colin Brewer) |
Art Department
| Michael Guyett | ... | standby painter (uncredited) |
Sound Department
| Richard Langford | ... | sound recordist |
| Peter Lennard | ... | sound editor |
| Ken Ritchie | ... | sound recordist |
Stunts
| Roberta Gibbs | ... | stunt performer (uncredited) |
Camera and Electrical Department
| Norman Jones | ... | camera operator |
| Maurice Gillett | ... | gaffer (uncredited) |
Costume and Wardrobe Department
| Bridget Sellers | ... | wardrobe supervisor |
Music Department
| Kenneth V. Jones | ... | conductor |
Script and Continuity Department
| June Randall | ... | continuity |
Additional Crew
| Samuel Z. Arkoff | ... | presenter |
| James H. Nicholson | ... | presenter |
| Dennison Thornton | ... | publicist |
| Larry Signy | ... | unit publicity (uncredited) |
