Directed by
| Juan Fortuny | ... | (as John Fortuny) |
Writing Credits (in alphabetical order)
| Juan Fortuny | ... | (as John Fortuny) |
| Marius Lesoeur | ... | (as A.L. Mariaux) |
| H.L. Rostaine | ||
Cast (in credits order)
| Paul Naschy | ... | Jack Surnett (as Paul Nash) | |
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Silvia Solar | ... | Ana (as Sylvia Solar) |
| Olivier Mathot | ... | Henry (as Oliver Matot) | |
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Evelyne Scott | ... | Barbara (as Evelyn Scott) |
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Claude Boisson | ... | Paul (as Yul Sanders) |
| Rest of cast listed alphabetically: | |||
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Gilda Arancio | ... | Ingrid (as Gilda Anderson) |
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Pierre Biet | ... | André |
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Monique Gérard | ... | La Bouquetiere |
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Alain Hardy | ... | Villageois |
| Víctor Israel | ... | Karl | |
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Richard Kolin | ... | Willy |
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Antonia Lotito | ... | Emmy |
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Roberto Mauri | ... | Le Sadique / the Sadist |
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César Ojinaga | ||
| Carlos Otero | ... | Doc Ritter | |
| Ricardo Palmerola | ... | Prof. Teets (as Richard Palmer) | |
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Jaume Picas | ... | Criado |
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Muriel Renaud | ... | Natalia |
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Jean Roville | ... | Le Maire |
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Guy Verda | ... | Marcel |
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Marius Lesoeur | ... | Le gendarme qui tire à la mitraillette (uncredited) |
Produced by
| Marius Lesoeur | ... | executive producer |
| Antonio Liza | ... | producer |
Music by
| Daniel White | ||
Cinematography by
| Raymond Heil | ||
Editing by
| Albert Gasset Nicolau | ... | (as Alberto G. Nicolau) |
Production Design by
| Juan Alberto Soler | ... | (as Juan Alberto) |
Makeup Department
| Francisco Manteca | ... | makeup artist (as Frank Mantek) |
Production Management
| Miguel Mezquíriz | ... | production manager |
Second Unit Director or Assistant Director
| Ángel G. Gauna | ... | assistant director (as Ange Gauna) |
| Juan Fortuny Jr. | ... | assistant director (uncredited) |
| Daniel Lesoeur | ... | assistant director (uncredited) |
Sound Department
| Pierre Goumy | ... | sound |
Camera and Electrical Department
| Jaume Biadiu | ... | assistant camera (as James Biadu) |
| Juan Prous | ... | camera operator (as John Proust) |
Additional Crew
| Rafael Luis Calvo | ... | voice dubbing: Ricardo Palmerola (uncredited) |
| Manuel Cano | ... | voice dubbing: Olivier Mathot (uncredited) |
| Roser Cavallé | ... | voice dubbing (uncredited) |
| Juan Comellas | ... | voice dubbing: Claude Boisson (uncredited) |
| Arsenio Corsellas | ... | voice dubbing: Carlos Otero (uncredited) |
| Santiago Cortés | ... | voice dubbing (uncredited) |
| Antonio Fernández | ... | voice dubbing: Victor Israel (uncredited) |
| Elsa Fábregas | ... | voice dubbing: Silvia Solar (uncredited) |
| Antonio García Moral | ... | voice dubbing: Roberto Mauri (uncredited) |
| Francisco Garriga | ... | voice dubbing: Paul Naschy (uncredited) |
| María Dolores Gispert | ... | voice dubbing (uncredited) |
| Dionisio Macías | ... | voice dubbing: Richard Kolin (uncredited) |
| Luis Posada Mendoza | ... | voice dubbing (uncredited) |
| Asunción Vitoria | ... | voice dubbing (uncredited) |
| Consuelo Vives | ... | voice dubbing: Gilda Arancio (uncredited) |