Directed by
| Jesús Franco | ... | (as J. Frank Manera) |
Writing Credits (in alphabetical order)
| Enrico Colombo | ... | (adaptation) (as E. Colombo) |
| Jesús Franco | ... | (adaptation) |
| Michael Haller | ||
| Harry Alan Towers | ... | (story) (as Peter Welbeck) |
| Anthony Scott Veitch | ||
Cast (in credits order) verified as complete
| Christopher Lee | ... | Judge Jeffries | |
| Maria Schell | ... | Mother Rosa | |
| Leo Genn | ... | Lord Wessex | |
 |
Hans Hass Jr. | ... | Harry Selton (as Hans Hass) |
| Maria Rohm | ... | Mary Gray | |
| Margaret Lee | ... | Alicia Gray | |
| Peter Martell | ... | Barnaby | |
| Howard Vernon | ... | Jack Ketch | |
| Milo Quesada | ... | Satchel | |
| Rest of cast listed alphabetically: | |||
|
|
Werner Abrolat | ... | Inquisitor Matt (uncredited) |
|
|
Giuliana Garavaglia | ... | (uncredited) |
| Diana Lorys | ... | Sally Gaunt (uncredited) | |
| José Martínez Blanco | ... | Steven Truro (uncredited) | |
| José María Prada | ... | Palafox (uncredited) | |
|
|
Vicente Roca | ... | Chief Prosecutor (uncredited) |
|
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John Thompson | ... | Jonathan Dickens (uncredited) |
| Serena Vergano | ... | (uncredited) | |
Produced by
| Enrico Colombo | ... | producer |
| Arturo Marcos | ... | producer |
| Harry Alan Towers | ... | producer |
Music by
| Bruno Nicolai | ||
Cinematography by
| Manuel Merino | ||
Editing by
| Derek Parsons | ||
| Gertrud Petermann | ... | (German version) |
Art Direction by
| Jack Taylor | ... | (as George O. Brown) |
Set Decoration by
| Jack Taylor | ... | (as George O'Brown) |
Second Unit Director or Assistant Director
| Alberto Chiarolla | ... | assistant director (as Alberto Chianella) |
| John Thompson | ... | assistant director |
Sound Department
| Joyce Oxley | ... | dubbing editor |
Camera and Electrical Department
| Manuel Merino | ... | lighting cameraman |
Additional Crew
| Ursula Herwig | ... | voice dubbing: Maria Rohm (uncredited) |
