Directed by
| Ramón Comas | ||
Writing Credits
| Keith Luger | ... | (story and dialogue) |
| Keith Luger | ... | (screenplay) and |
| Chris Chatterley | ... | (screenplay) and |
| José Luis Madrid | ... | (screenplay) and |
| Ramón Comas | ... | (screenplay) |
Cast (in credits order) complete, awaiting verification
| Adrian Hoven | ... | Paul Riviere | |
| Gérard Landry | ... | Commander Fernion | |
 |
Barth Warren | ... | Bruno Nussak |
| Teresa del Río | ... | Sonia Bellford (as Tere del Rio) | |
| Claudia Gravy | ... | Shantung | |
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Lilia Neyung | ... | Leila Wong |
| Karin Feddersen | ... | Françoise Moreau | |
| George Wang | ... | Dr. Kung | |
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Josyane Gibert | ... | Pamela (as Josiane Gibert) |
| Wolfgang Preiss | ... | Dr. Angus Cromwell | |
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Manuel Escalera | ... | Hotel Manager |
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Roberto Llamas | ... | Dr. Gordon Hutchkiss / Dr. Frederick Jackson |
| Rest of cast listed alphabetically: | |||
| Robert McNamara | ... | Self - 1960-1968 Secretary of Defense (archive footage) (uncredited) | |
Produced by
| Pier A. Caminnecci | ... | producer |
| Antonio González Caballero | ... | general producer (as Antonio González) |
| José Miguel Hernández | ... | secretary of production (as José Hernández) |
| Adrian Hoven | ... | producer |
| Bachi Rocafort | ... | executive producer |
Music by
| Jerry van Rooyen | ... | (German version) |
| Piero Umiliani | ||
Cinematography by
| Eloy Mella | ||
Editing by
| Pablo G. del Amo | ||
Art Direction by
| Pablo Gago | ... | (as Pablo A. Gago) |
Makeup Department
| Mariano García | ... | makeup artist |
| Alberto Gutiérrez | ... | assistant makeup artist |
| Esther Martín | ... | hair stylist |
Production Management
| Robert Gaffron | ... | production supervisor |
| Karl Heinz Mannchen | ... | production manager (German version) |
| Juan A. Rocafort | ... | production supervisor |
| Manuel Torres | ... | production manager |
Second Unit Director or Assistant Director
| Gan Piero Brescia | ... | assistant director |
| Marin Loret | ... | assistant director |
| Francisco Romero | ... | assistant director |
| José Royo | ... | assistant director |
Art Department
| Aurelio Gallego | ... | assistant art director |
Sound Department
| Hans-Dieter Schwarz | ... | sound |
Camera and Electrical Department
| Francisco Beringola | ... | assistant camera (as Francisco J. Beringola) |
| Alejandro Bijes | ... | still photographer |
| Teo Escamilla | ... | second operator (as Teodoro Escamilla) |
| Francesco Izzarelli | ... | operator: second unit |
Costume and Wardrobe Department
| Esperanza Sierra | ... | seamstress |
Editorial Department
| José Luis Anglés | ... | first assistant editor |
| Rosário Sainz | ... | assistant editor |
| Frizzi Schmidt | ... | assistant editor (German version) |
Additional Crew
| Rafael de la Rosa | ... | weapons master |
| Juan Estelrich | ... | production assistant |
| José Luis García Arrojo | ... | production assistant (as José Luis García Rojo) |
| Lothar Blumhagen | ... | voice dubbing: Wolfgang Preiss (uncredited) |
| Thomas Braut | ... | voice dubbing (uncredited) |
| Hans-Walter Clasen | ... | voice dubbing: George Wang (uncredited) |
| Renate Danz | ... | voice dubbing (uncredited) |
| Uta Hallant | ... | voice dubbing: Claudia Gravy (uncredited) |
| Ursula Herwig | ... | voice dubbing: Karin Faddersen (uncredited) |
| Gert Günther Hoffmann | ... | voice dubbing: Barth Warren (uncredited) |
| Peter Schiff | ... | voice dubbing (uncredited) |
| Friedrich Schoenfelder | ... | voice dubbing: Gérard Landry (uncredited) |
