Directed by
| Amando de Ossorio | ... | (as Gregory Greens) |
Writing Credits
| Amando de Ossorio | ... | (screenplay) (as Gordon A. Osburn) |
Cast (in credits order)
| Timothy Bottoms | ... | Pedro Fontán | |
| Taryn Power | ... | Margaret | |
| Jared Martin | ... | Linares | |
| Ray Milland | ... | Prof. Timothy Wallace | |
| Gérard Tichy | ... | (as Gerard Tichy) | |
| Carole James | ... | Jill | |
| Jack Taylor | ... | Asesino | |
| León Klimovsky | ... | Dr. Moore (as Leon Klimovsky) | |
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Miguel de Grandy | ||
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Paul Benson | ||
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Charly Bravo | ||
| Víctor Israel | ... | Porto (as Vic Israel) | |
| José Canalejas | ... | (as Joe Canals) | |
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Eduardo Bea | ... | (as Edward Beamont) |
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Teresa del Olmo | ... | (as Texsa Elmer) |
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Alicia González | ... | (as Alice Burby) |
| Pilar Alcón | ... | Enfermera (as Diana Eagle) | |
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José Yepes | ... | (as Joseph Yates) |
| Jorge Bosso | ... | (as George Bosso) | |
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Beatriz Savón | ... | (as Beatrice Floyd) |
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José Bastida | ... | (as Sal Bastide) |
| Barta Barri | ... | Defensor | |
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Paco Catalá | ... | (as Frank Catal) |
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Fabián Conde | ... | (as Fabian Count) |
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Alfonso de la Vega | ... | (as Alphonse McCoy) |
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Alfredo Enríquez | ... | (as Alfred Rance) |
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José Ramón Pardo | ... | (as Joseph R. Part) |
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Luís Zagalo | ... | (as Luois Zagaunt) |
Produced by
| José Frade | ... | producer (as Jose Frade) |
Music by
| Manel Santisteban | ... | (as Robin Davis) |
Cinematography by
| Raúl Pérez Cubero | ... | director of photography (as Raul P. Cutler) |
Editing by
| José Antonio Rojo | ... | (as Anthony Red) |
Art Direction by
| José Luis Galicia | ... | (as Joseph L. Galic) |
Makeup Department
| Fernando Florido | ... | makeup artist (as Fernand Flower) |
| Dolores García Rey | ... | hair stylist (as Lola G. King) |
Production Management
| José Salcedo | ... | executive in charge of production (as Joseph Salmer) |
| Félix Rodríguez | ... | assistant unit manager (uncredited) |
Second Unit Director or Assistant Director
| Juan Ignacio Galván | ... | first assistant director (as John L. Freeman) |
| Andy Valley | ... | second assistant director |
Art Department
| Vincent D. White | ... | construction coordinator |
Sound Department
| Joseph Cherry | ... | sound recordist |
Special Effects by
| Frank Cuttlet | ... | special effects |
| Thomas Urbant | ... | special effects |
| Joseph Vargas | ... | special effects |
Camera and Electrical Department
| Alex Digest | ... | still photographer |
| Salvador Gómez Calle | ... | assistant camera (as Sal G. Street) |
| Joe Marine | ... | generator operator |
| Jules Romer | ... | gaffer |
| Antonio Sáiz Palazón | ... | camera operator (as Anthony Saizel) |
Costume and Wardrobe Department
| Lita Church | ... | wardrobe |
Editorial Department
| Charles Red | ... | apprentice editor |
| Pat Wood | ... | assistant editor |
Script and Continuity Department
| Erika Szel | ... | script supervisor |
Additional Crew
| Joseph Ricoh | ... | second production assistant |
| Phil Rodriguez | ... | production assistant |
| Víctor Agramunt | ... | voice dubbing: Timothy Bottoms (uncredited) |
| Rosa María Belda | ... | voice dubbing: Taryn Power (uncredited) |
| José Antonio Ceinos | ... | voice dubbing: Jared Martin (uncredited) |
| Ricardo Palacios | ... | voice dubbing (uncredited) |
| Jesús Puente | ... | voice dubbing: Ray Milland (uncredited) |
| Aparicio Rivero | ... | voice dubbing: various (uncredited) |
| José Segura | ... | voice dubbing (uncredited) |
| Miguel Zúñiga | ... | voice dubbing (uncredited) |
