 | Janet Leigh als Mary Ann |
 | Robert Hoffmann als Jean-Paul Audry |
 | Klaus Kinski als Erich Weiss |
 | Riccardo Cucciolla als Agostino Rossi |
 | George Rigaud als Gregg |
 | Adolfo Celi als Mark Milford |
 | Edward G. Robinson als Prof. James Anders |
 | Jussara als Setuaka |
 | Miguel del Castillo als Manager |
 | Luciana Angiolillo |
 | Valentino Macchi als (credit only) |
| Anny Degli Uberti |
| Aldo Bonamano |
 | Fulvio Mingozzi als Milford's Thug (uncredited) |
| Paolo Bianchini | Story |
| Giuliano Montaldo | Director |
| Mino Roli | Screenplay |
| Nino Baragli | Editor |
| Mino Roli | Story |
| Augusto Caminito | Story |
| Augusto Caminito | Screenplay |
| Marcello Fondato | Screenplay |
| José Antonio de la Loma | Screenplay |
| Marcello Coscia | Screenplay |
| Ennio Morricone | Original Music Composer |
| Bruno Nicolai | Conductor |
| Antonio Macasoli | Director of Photography |
| Massimo Dallamano | Line Producer |
| Arrigo Colombo | Producer |
| Giorgio Papi | Producer |
| Franco Serino | Production Manager |
| Roberto Machado | Production Manager |
| Valentín Sallent | Production Manager |
| Lucio Trentini | Unit Manager |
| Raul Araujo | Unit Manager |
| Genis Rodriquez | Unit Manager |
| Franco Cuccu | Production Secretary |
| José Malla | Production Secretary |
| Roberto Velocchio | Assistant Production Design |
| María José Bassi | Assistant Production Design |
| Armando Grilli | Special Effects |
| Mauro Sacripanti | First Assistant Director |
| Carlos Couto | First Assistant Director |
| Federico Canudas | First Assistant Director |
| Carlo Fiore | Camera Operator |
| Ricardo González | Camera Operator |
| Umberto Picistrelli | Sound |
| Alvaro Orsini | Boom Operator |
| Mario Van Riel | Makeup Artist |
| Adrián Jaramillo | Makeup Artist |
| Luciano Vito | Hairstylist |
| Giuseppe Gatti | Assistant Camera |
| Alberto Marrama | Assistant Camera |
| Santiago Rodríguez | Assistant Camera |
| Alberto Boccianti | Production Design |
| Giorgio Pes | Set Decoration |
| Juan Alberto Soler | Set Decoration |
| Giorgio Desideri | Costume Design |
| Enrique Garriga | Costume Design |
| Elvira Tonini | Assistant Editor |
| Zeljko Kunkera | Executive Producer |
