Directed by
| Juan Fortuny | ||
Writing Credits (in alphabetical order)
| Arturo Buendía | ||
| Juan Fortuny | ||
| Jesús Franco | ... | (story) (as A.L. Mariaux) |
| Ángel G. Gauna | ||
| Antonio Jover | ||
| Frank Ladret | ... | (story) |
Cast (in credits order)
 |
Mick Micheyl | ... | Lydia Martha |
| Howard Vernon | ... | L'inspecteur de police Revel | |
| Dany Carrel | ... | Luce Arnel | |
| Manuel Monroy | ... | Rogelio | |
| Carlos Otero | ... | Florencio | |
| Manuel Gas | ... | Le commissaire Luna | |
| Bobby Deglané | ... | Presentador Radio Madrid | |
|
|
Ricardo Fusté | ... | Profesor Visconti |
|
|
Ángel Moreno | ... | Abuel |
|
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Salvador Garrido | ... | Mr. Adrian (as Salvador Carrido) |
| Luis Induni | ... | Jefe de policía | |
|
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José Palomo | ... | Profesór de musica |
| Rest of cast listed alphabetically: | |||
| Josep Maria Angelat | ... | Voz al teléfono (uncredited) | |
|
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Ricardo Martín | ... | Director de radio (uncredited) |
Produced by
| Juan Fortuny | ... | associate producer |
| Marius Lesoeur | ... | co-producer |
| Miguel Mezquíriz | ... | producer |
Music by
| Mick Micheyl | ||
Cinematography by
| Juan Fortuny | ||
| Federico G. Larraya | ||
Editing by
| Albert Gasset Nicolau | ||
Set Decoration by
| Ramón Matheu | ||
Makeup Department
| Antonio Turell | ... | makeup artist |
Production Management
| Stany Cordier | ... | unit manager |
| Antonio Jover | ... | production manager |
Second Unit Director or Assistant Director
| Arturo Buendía | ... | assistant director |
| Ángel G. Gauna | ... | assistant director |
Camera and Electrical Department
| Aurelio G. Larraya | ... | camera operator |
| Julio Pérez de Rozas | ... | assistant camera |
Music Department
| Armand Canfora | ... | conductor |
Additional Crew
| Juan Zaro | ... | production secretary |
| J. Algarra Díaz | ... | voice dubbing: Salvador Garrido (uncredited) |
| Miguel Alonso | ... | voice dubbing: Luis Induni/various (uncredited) |
| Rafael Calvo Gutiérrez | ... | voice dubbing: various (uncredited) |
| Teresa Cunillé | ... | voice dubbing (uncredited) |
| Ramón Durán | ... | voice dubbing (uncredited) |
| Juanita Espín | ... | voice dubbing (uncredited) |
| Julio Gallego | ... | voice dubbing: Ricardo Fusté (uncredited) |
| Estanis González | ... | voice dubbing (uncredited) |
| Carolina Jiménez | ... | voice dubbing: Mick Micheyl (uncredited) |
| Carmen Lombarte | ... | voice dubbing: Dany Carrel (uncredited) |
| Jesús Menéndez | ... | voice dubbing: Ángel Moreno (uncredited) |
| Celedonio Merino | ... | voice dubbing: José Palomo (uncredited) |
| Juan Monfort | ... | voice dubbing: various (uncredited) |
| César Ojinaga | ... | voice dubbing: Ricardo Martín (uncredited) |
| Felip Peña | ... | voice dubbing: Manuel Gas (uncredited) |
| Carlos Ronda | ... | voice dubbing (uncredited) |
| Alfonso Santigosa | ... | voice dubbing: Howard Vernon (uncredited) |
| José Soler | ... | voice dubbing (uncredited) |
| Juan Manuel Soriano | ... | voice dubbing: Carlos Otero (uncredited) |
