Directed by
| Jesús Franco | ... | (as Jess Franck) |
Writing Credits (in alphabetical order)
| Jesús Franco | ... | (screenplay and dialogue) |
| Jesús Franco | ... | (story) (as David Kühne) |
| Nicole Guettard | ... | (as David Coll) |
| A. Norévo | ... | (adaptation) |
Cast (in credits order)
| Hugo Blanco | ... | Andros (as Hugh White) | |
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Agnès Spaak | ... | Melissa |
| Perla Cristal | ... | Rosa | |
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Magda Maldonado | ... | Amira (as Magda MacDonald) |
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Marcelo Arroita-Jáuregui | ... | Dr. Conrad Jekyll |
| Pepe Rubio | ... | Juan Manuel (as José Rubio) | |
| Pastor Serrador | ... | Inspector Klein | |
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Marta Reves | ||
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Daniel Blumer | ... | Karl Steiner |
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Luisa Sala | ... | Inglud Jekyll / Ingrid Fisherman |
| Manuel Guitián | ... | Ciceron | |
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Mer Casas | ... | Conrad's Girlfriend |
| Rafael Hernández | ... | Club Owner | |
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José Truchado | ... | Policeman |
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Juan Antonio Soler | ... | Witness |
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Javier de Rivera | ... | The Professor (as Javier Rivera) |
| Julio Infiesta | ... | Club Security | |
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Ramón Lillo | ... | Emilio - Inspector's Assistant |
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Julia Toboso | ||
| Maribel Hidalgo | |||
| Jesús Franco | ... | Piano Player | |
| Rest of cast listed alphabetically: | |||
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Pedro Fenollar | ... | Lang (uncredited) |
Produced by
| Marius Lesoeur | ... | producer |
Music by
| Fernando García Morcillo | ||
| Daniel White | ||
Cinematography by
| Alfonso Nieva | ||
Editing by
| Ángel Serrano | ||
Production Design by
| Fernando Somoza | ||
Sound Department
| R. St. Martin | ... | sound engineer |
Additional Crew
| Julio Parra | ... | production supervisor |
