Directed by
| Paul Naschy | ... | (as Jacinto Molina) |
Writing Credits (in alphabetical order)
| Antonio Fos | ... | (uncredited) |
| Paul Naschy | ... | (as Jacinto Molina) |
Cast (in credits order)
| Paul Naschy | ... | Paul / Alaric de Marnac | |
 |
Julia Saly | ... | Geneviève |
| Lola Gaos | ... | Mabile | |
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Silvia Miró | ... | Mireille |
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Frances Ondiviela | ... | Julie (as Pat Ondiviela) |
| Manuel Zarzo | ... | Dr. Lacombe | |
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José Vivó | ... | Dr. Rigaud |
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Charly Bravo | ||
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José Sacristán | ... | Alain (as José Sacristán Hernández) |
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Salvador Sáinz | ... | Catholic Priest |
| Rest of cast listed alphabetically: | |||
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Héctor Cantolla | ... | Paul / Alaric de Marnac (voice) (uncredited) |
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Teresa del Olmo | ... | Mabile (voice) (uncredited) |
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Ángela González | ... | Julie (voice) (uncredited) |
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Carole Kirkham | ... | Alaric's wife (uncredited) |
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María Romero | ... | Geneviève (voice) (uncredited) |
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María Luisa Rubio | ... | Mireille (voice) (uncredited) |
Produced by
| Augusto Boué | ... | executive producer |
| Julia Saly | ... | producer |
Music by
| Moncho Alpuente | ||
| Servando Carballar | ||
Cinematography by
| Julio Burgos | ||
Editing by
| Roberto Fandiño | ||
Set Decoration by
| Luis Vázquez | ||
Makeup Department
| Fernando Florido | ... | makeup artist (as Fernan Florido) |
| Dolores García Rey | ... | hair stylist |
Production Management
| Juan Clemente Prosper | ... | production manager |
