Directed by
| José María Forqué | ... | (as José Mª Forqué) |
| José Antonio Nieves Conde | ... | (as José A. Nieves Conde) |
Writing Credits
| Lluís Josep Comerón | ... | (story) (as Luis Comerón) & |
| Jorge Illa | ... | (story) & |
| José Antonio de la Loma | ... | (story) |
| Manuel Tamayo | ... | (adaptation) |
Cast (in credits order)
| Jorge Mistral | ... | Jan Walzak / Paul Banek | |
| Nani Fernández | ... | Dana | |
| Jesús Tordesillas | ... | Josef | |
| Félix Dafauce | ... | Grumko | |
| Nicolás D. Perchicot | ... | Padre Oberski | |
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Juan Manuel Soriano | ... | Genka (as Juan M. Soriano) |
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María Dolores Gispert | ... | Ludmilla (as Mª Dolores Gispert) |
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Tomás Torres | ... | Juan |
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César Ojinaga | ... | Lukas |
| Joan Capri | ... | Especialista en minas (as Juan Capri) | |
| José Marco | ... | Kadenko | |
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Diana Mayer | ... | Isa |
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Esther Parera | ... | Maruska |
| Fernando Cebrián | ... | Hermano de Kadenko | |
| Rubén Rojo | ... | Chapek | |
| Rest of cast listed alphabetically: | |||
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Mario de Bustos | ... | Conductor del autobús (uncredited) |
| Juan Monfort | ... | Banek (uncredited) | |
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Enrique Navas | ... | Capataz Antonev (uncredited) |
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Alberto Vialis | ... | Maitre (uncredited) |
Music by
| Isidro B. Maiztegui | ||
Cinematography by
| José F. Aguayo | ... | director of photography (as José Aguayo) |
| Francisco Sempere | ... | (uncredited) |
Editing by
| Petra de Nieva | ||
Set Decoration by
| Sigfrido Burmann | ... | (as Sigfrido Burman) |
Costume Design by
| Rafael Richart | ... | (as Rafael Richard) |
Makeup Department
| Rodrigo Gurrucharri | ... | makeup artist (as Rodrigo Gurucharri) |
Production Management
| Telesforo de la Plaza | ... | production manager (as T. de la Plaza) |
Second Unit Director or Assistant Director
| Sinesio Isla | ... | assistant director |
| Domingo Pruña | ... | assistant director (as Domingo Pruna) |
| Joaquín Vera | ... | assistant director |
Art Department
| Enrique Bronchalo | ... | construction coordinator (as Bronchalo) |
Sound Department
| Enrique de la Riva | ... | sound technician |
Camera and Electrical Department
| Salvador Gil | ... | camera operator |
| Emilio Godes | ... | still photographer |
| Ricardo González | ... | assistant camera |
| Ricardo Navarrete | ... | camera operator (as Ricardo G. Navarrete) |
Additional Crew
| Jesús García Gárgoles | ... | production assistant (as Jesús G. Gárgoles) |
| José Manuel M. Herrero | ... | production assistant |
| Eduardo Berraondo | ... | voice dubbing: José Marco (uncredited) |
| Rafael Calvo Revilla | ... | voice dubbing: Jorge Mistral- some lines (uncredited) |
| Joaquín Díaz | ... | voice dubbing: Enrique Navas (uncredited) |
| Celedonio Merino | ... | voice dubbing (uncredited) |
| Juan Monfort | ... | voice dubbing (uncredited) |
| Fernando Ulloa | ... | voice dubbing: Tomás Torres (uncredited) |
