Directed by
| Jesús Franco | ||
Writing Credits (in alphabetical order)
| Jesús Franco | ... | (screenplay) |
| Jesús Franco | ... | (story) |
Cast (in credits order) complete, awaiting verification
| William Berger | ... | Dr. Orloff | |
| Montserrat Prous | ... | Melissa Comfort | |
| Edmund Purdom | ... | Inspector Crosby (as Edmond Purdom) | |
 |
Loreta Tovar | ... | Martha Comfort (as Loretta Tovar) |
|
|
Kali Hansa | ... | Lady Flora Comfort |
| Joaquín Blanco | ... | Agent Nicolas Michel (as John Russell) | |
| José Manuel Martín | ... | Albert Mathews | |
|
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Jaume Picas | ... | Sir Henry Robert Comfort (as Jaime Picas) |
| Lina Romay | ... | Sweet Davey Brown's Girlfriend | |
| Robert Woods | ... | Sweet Davey Brown (as Robert Wood) | |
| Rest of cast listed alphabetically: | |||
| Jesús Franco | ... | Lord Comfort (uncredited) | |
Music by
| Jesús Franco | ... | (as David Khunne) |
Cinematography by
| Antonio Millán | ||
Editing by
| Roberto Fandiño | ||
Set Decoration by
| Josep Massagué | ... | (as José Massagué) |
Makeup Department
| E. Cervera de la Torre | ... | assistant makeup artist (as E. Cervera de la Torre) |
| Hipólita López | ... | hair stylist |
| Carmen Menchala | ... | makeup artist (as Carmen Menchaca) |
Production Management
| Antonio Cervera | ... | production manager |
Second Unit Director or Assistant Director
| Anne Settimó | ... | assistant director (as Ana Mª Settimo) |
Art Department
| Alfredo Montenegro | ... | set dresser |
Camera and Electrical Department
| Raymond Hardy | ... | still photographer (as Ramón Ardid) |
| Máximo L. Piedra | ... | still photographer |
| Alberto Prous | ... | second operator |
| Juan Prous | ... | assistant camera (as Juan A. Prous) |
Editorial Department
| Nicolás Muñoz | ... | assistant editor |
Additional Crew
| Isidre Prous | ... | production assistant (as Isidro Prous) |
| Pepita Pruna | ... | shooting secretary (as Josefina Pruna) |
| Vicente Bañó | ... | voice dubbing: José Manuel Martín (uncredited) |
| Rafael de Penagos | ... | voice dubbing: Jaime Picas (uncredited) |
| Ángela González | ... | voice dubbing: Lina Romay (uncredited) |
| José Guardiola | ... | voice dubbing: William Berger (uncredited) |
| Delia Luna | ... | voice dubbing (uncredited) |
| José Moratalla | ... | voice dubbing: Joaquín Blanco (uncredited) |
| Manuel Peiró | ... | voice dubbing: Robert Woods (uncredited) |
| Simón Ramírez | ... | voice dubbing: Edmund Purdom (uncredited) |
| María Romero | ... | voice dubbing: Kali Hansa (uncredited) |
| Mayte Santamarina | ... | voice dubbing: Lorita Tovar (uncredited) |
| Selica Torcal | ... | voice dubbing: Montserrat Prous (uncredited) |
