| Art Director | Wolfgang Burmann |
| Assistant Director | Fulvio Barresi, R. Marcilly |
| Camera Operator | Joe D'Amato |
| Cast | Carroll Baker (as Helen), Jean Sorel (as Maurice Sauvage), Luis Dávila (as Albert Duchamps), Alberto Dalbés (as Dr. Harry Webb), Marina Coffa (as Susan Sauvage), Anna Proclemer (as Constance Sauvage), Hugo Blanco, Lisa Halvorsen (as Solange), Manuel Díaz Velasco (as Miguel), Jacques Stany (as James), Rossana Rovere (as Nurse), Calisto Calisti (as Doctor), Alfonso de la Vega (as Chauffeur), Miguel Beltrán, Gaspar Forteza (as 1st Cop), Francesco Narducci (as 2nd Cop) |
| Cinematographer | Guglielmo Mancori |
| Costume Design | Giovanni Naitano |
| Director | Umberto Lenzi |
| Distributor | Medusa Distribuzione (as (1970) (Italy) (theatrical)), Diasa (as (1971) (Spain) (theatrical)), AVCO Embassy Television (as (1973) (USA) (TV) (dubbed)), As Films S.A. (as (Spain) (theatrical)), Commonwealth United Entertainment (as (USA) (theatrical) (dubbed)), Interpeninsular (as (Spain) (theatrical)) |
| Dubbing | C.D.C. |
| Executive Producer | Bruno Bolognesi |
| Film Editor | Enzo Alabiso, Stanley Frazen, Antonio Ramírez de Loaysa |
| Make-up Artist | Mario Van Riel |
| Music | Gregorio García Segura, Nino Rota |
| Music Publisher | Edizione Musicale - Nazionalmusic |
| Musical Director | Piero Umiliani |
| Production Company | Medusa Distribuzione, Tritone Cinematografica |
| Production Company (Co-Production) | Société Nouvelle de Cinématographie (SNC), Producciones Cinematográficas D.I.A. |
| Production Designer | Franco Bottari |
| Production Manager | Francisco Lara Polop, Averoe Stefani |
| Production Secretary | Lamberto Andreani |
| Script Supervisor | María Luz Manzano |
| Sound | Carlo Diotallevi, Romano Pampaloni, Angelo Spadoni |
| Sound Synchronisation | N.C. |
| Unit Production Manager | Mario Alabiso |
| Writer (Screenplay) | Marcello Coscia, Bruno Di Geronimo, Rafael Romero Marchent, Marie Claire Solleville |
| Writer (Story) | Marcello Coscia, Rafael Romero Marchent |
| Links | https://www.imdb.com/title/tt0064787/?ref_=nm_flmg_dr_41 |
