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Víctor Petit as Dr. Henry Stein |
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María Kosty as Joan Stein |
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Sandra Mozarowsky as Lucy |
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Julia Saly as Tilda Flanagan |
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José Antonio Calvo as Teddy |
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Javier de Rivera as Doctor |
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María Vidal as Mrs. Flanagan |
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Fernando Villena as Flanagan |
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Oscar Phens as |
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Susana Estrada as Girl sacrificed at the beginning |
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Luis Ciges as |
| Directing | Amando de Ossorio | Director |
| Writing | Amando de Ossorio | Writer |
| Production | José Ángel Santos | Executive Producer |
| Production | José Antonio Pérez Giner | Producer |
| Editing | Pedro del Rey | Editor |
| Production | Modesto Pérez Redondo | Production Manager |
| Costume & Make-Up | Ana Criado | Hairstylist |
| Camera | Antonio Luengo | Still Photographer |
| Editing | Blanca Rodríguez | Assistant Editor |
| Directing | Pedro Pardo | Assistant Director |
| Costume & Make-Up | Cristóbal Criado | Makeup Artist |
| Camera | Alfredo Fernández | Camera Operator |
| Sound | Antón García Abril | Original Music Composer |
| Camera | Francisco Sánchez | Director of Photography |
