Directed by
| Jesús Franco | ... | (as J.P. Johnson) |
Writing Credits (in alphabetical order)
| Gérard Brisseau | ... | (writer) (uncredited) |
| Jesús Franco | ... | (as J.P. Johnson) |
| Josyane Gibert | ... | (dialogue) (as P. Belair) |
Cast (in credits order) complete, awaiting verification
| Lina Romay | ... | Countess Irina Karlstein | |
| Jack Taylor | ... | Baron Von Rathony | |
| Alice Arno | ... | Princess de Rochefort's Servant | |
| Monica Swinn | ... | Princess de Rochefort (as Monica Swin) | |
| Jesús Franco | ... | Dr. Roberts (as Jess Franck) | |
| Luis Barboo | ... | Irina's Manservant | |
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Jean-Pierre Bouyxou | ... | Dr. Orloff |
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Raymond Hardy | ... | Hotel Masseur |
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Anna Watican | ... | Anna, a journalist |
| Rest of cast listed alphabetically: | |||
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Gilda Arancio | ... | Victim in the Wall (uncredited) |
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Richard Bigotini | ... | Vice Cop (uncredited) |
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Roger Germanes | ... | Irina's First Victim (uncredited) |
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Pierre Quérut | ... | Inspector (uncredited) |
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Ricardo Vázquez | ... | (uncredited) |
Produced by
| Marius Lesoeur | ... | producer |
| Pierre Quérut | ... | co-producer |
Music by
| Daniel White | ||
Cinematography by
| Jesús Franco | ... | (as Joan Vincent) |
Editing by
| Jesús Franco | ... | (as P. Querut) |
Second Unit Director or Assistant Director
| Richard Bigotini | ... | assistant director (uncredited) |
Camera and Electrical Department
| Raymond Hardy | ... | still photographer (uncredited) |
Editorial Department
| Raymond Hardy | ... | assistant editor (uncredited) |