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Lone Fleming as Betty Turner |
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César Burner as Roger Whelan |
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María Elena Arpón as Virginia White |
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José Thelman as Pedro Candal |
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Rufino Inglés as Insp. Oliveira |
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Simón Arriaga as Morgue keeper |
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Francisco Sanz as Prof. Candal (librarian) |
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Juan Cortés as Coroner |
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Andrés Isbert as |
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Antonio Orengo as Train engineer |
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José Camoiras as |
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María Silva as Maria |
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Carmen Yazalde as Sacrificed maiden (uncredited) |
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Pedro Sempson as Train engineer (voice) (uncredited) |
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Verónica Llimerá as Nina |
| Directing | Amando de Ossorio | Director |
| Writing | Amando de Ossorio | Writer |
| Crew | Jesús Navarro Carrión | Additional Dialogue |
| Writing | Jesús Navarro Carrión | Dialogue |
| Production | José Antonio Pérez Giner | Executive Producer |
| Production | Salvadore Romero | Executive Producer |
| Sound | Antón García Abril | Original Music Composer |
| Camera | Pablo Ripoll | Director of Photography |
| Editing | José Antonio Rojo | Editor |
| Art | Jaime Duarte De Brito | Production Design |
| Art | Juan García | Set Decoration |
| Costume & Make-Up | José Luis Campos | Makeup Artist |
| Art | Jaime Duarte De Brito | Set Designer |
| Sound | Luis Castro | Sound Effects |
| Sound | José María San Mateo | Sound Recordist |
