Directed by
| Mario Siciliano | ||
Writing Credits (in alphabetical order)
| Julio Buchs | ... | (screenplay) |
| Julio Buchs | ... | (story) |
| Federico De Urrutia | ... | (screenplay) |
| Federico De Urrutia | ... | (story) |
| Ted Rusoff | ... | (additional dialogue) |
| Mario Siciliano | ... | (screenplay) |
Cast (in credits order) complete, awaiting verification
| Anthony Steffen | ... | Inspector Ranieri | |
| Richard Conte | ... | Dr. Stone | |
| Pilar Velázquez | ... | Dr. Sarah Turner (as Pilar Velasquez) | |
| Jorge Rivero | ... | Peter Crane | |
| Eduardo Fajardo | ... | Walter, the majordomo (as Eduardo Fayardo) | |
| Pia Giancaro | ... | Tanya | |
| Luis La Torre | ... | Robert Gifford | |
 |
Eva Vanicek | ... | Sonja |
| Luciano Pigozzi | ... | Derek Stevens (as Alan Collins) | |
| Lone Fleming | ... | Yvonne Chevrel (as Lane Fleming) | |
|
|
Flora Marrone | ... | (as Floria Marrone) |
| Terele Pávez | ... | Walter's wife (as Terele) | |
| Daniela Giordano | ... | Elizabeth Stevens | |
| Rest of cast listed alphabetically: | |||
| Álvaro de Luna | ... | Police Officer (uncredited) | |
Produced by
| Gonzalo Elvira | ... | producer |
Music by
| Stelvio Cipriani | ||
Cinematography by
| Vicente Minaya | ||
Editing by
| Otello Colangeli | ||
Production Design by
| José Antonio de la Guerra | ||
Makeup Department
| Marisa Marconi | ... | makeup artist |
| Carlos Nin | ... | makeup artist |
| Lidia Puglia | ... | hair stylist |
Production Management
| Piero Ghione | ... | production manager |
| Rafael Vázquez | ... | production manager (as Rafael Vazquez) |
| Carlo Zanotti | ... | production supervisor |
Second Unit Director or Assistant Director
| Ivo Barouch | ... | assistant director |
| Paulino González | ... | assistant director (as Paulino Gonzalez) |
Art Department
| José Antonio de la Guerra | ... | set designer |
| Mario Ferrari | ... | poster artist |
Sound Department
| Mario Lupi | ... | sound engineer |
| Fiorenzo Magli | ... | sound technician |
| Alberto Moretti | ... | boom operator |
| Sandro Occhetti | ... | sound mixer |
Special Effects by
| Paolo Ricci | ... | special effects |
Camera and Electrical Department
| Bruno Pellegrini | ... | assistant camera |
| Angelo Pennoni | ... | still photographer |
| Romolo Romagnoli | ... | key grip |
| Fortunato Terenzi | ... | chief electrician |
| Enzo Tosi | ... | camera operator |
Script and Continuity Department
| Blanca Astiasu | ... | script girl (as Blanca Astiasu Perez) |
Additional Crew
| Julio Parra | ... | production supervisor |
| Geoffrey Copleston | ... | voice dubbing: Luciano Pigozzi (english version) (uncredited) |
