| Assistant Camera | Aldo Bergamini, Francisco Javier Ferrer |
| Assistant Director | Angel G. Gauna |
| Assistant Editor | Maurizio Alabiso |
| Boom Operator | Tullio Petricca |
| Camera Operator | Elio Polacchi |
| Cast | Martine Brochard (as Paulette Stone), John Richardson (as Mark Burton), Ines Pellegrini (as Naiba Campbell), Andrés Mejuto (as Inspector Tudela), Mirta Miller (as Lisa Sanders), Daniele Vargas (as Robby Alvarado), George Rigaud (as Rev. Bronson), Silvia Solar (as Gail Alvarado), Raf Baldassarre (as Martinez - The Tour Guide), José María Blanco (as Inspector Lara), Marta May (as Alma Burton), John Bartha (as Mr. Hamilton), Olga Pehar (as Mrs. Randall), Verónica Miriel (as Jenny Hamilton), Olga Montes (as Peggy Randall), Richard Kolin (as Mr. Randall), Rina Mascetti (as Hospital Nurse), Fulvio Mingozzi (as Policeman), Vittorio Fanfoni, Francesco Narducci (as Receptionist At Hotel Presidente), Tom Felleghy (as Coroner), Lorenzo Piani, Nestore Cavaricci (as Policeman (uncredited)), Laura Trotter (as Murder Victim At Castle (uncredited)) |
| Cinematographer | Antonio Millán |
| Co-Producer | José María Cunillés |
| Conductor | Bruno Nicolai |
| Costume Design | Adriana Spadaro |
| Director | Umberto Lenzi |
| Distributor | Joseph Brenner Associates (JBA) (as (1978) (USA) (theatrical) (dubbed)), Wm. Lange & Associates (as (1979) (theatrical) (USA: Midwest) (dubbed)), Creswin Distribution (as (1979) (Canada) (theatrical) (dubbed)), House of Dare (as (1980) (Australia) (theatrical)) |
| Film Editor | Amedeo Moriani |
| Hair Stylist | Iolanda Angelucci, Erminia Lopez |
| Make-up Artist | Mario Di Salvio, Alfredo Tiberi |
| Music | Bruno Nicolai |
| Music Publisher | RCA |
| Producer | Joseph Brenner |
| Production Company | National Cinematografica, Pioneer, Estela Films |
| Production Manager | Antonio Girasante, Luis Marin |
| Production Supervisor | Renzo David, José Malla |
| Script Supervisor | Francesca Montani |
| Set Decoration | Stefano Paltrinieri |
| Set Designer | José Massagué |
| Sound | Umberto Oicistrelli, Umberto Picistrelli |
| Sound Effects | Roberto Arcangeli |
| Sound Mixer | Bruno Moreal |
| Soundtrack (????) (Italy) | Digitmovies Alternative Entertainment |
| Still Photographer | Francesco Narducci |
| Synchronization | C.D., N.C. |
| Titles | Studio Mafera |
| Voice Dubbing (English Version) | Carolyn De Fonseca (as (uncredited)) |
| Writer (Screenplay) | Umberto Lenzi, Félix Tusell |
| Writer (Story) | Umberto Lenzi, Félix Tusell |
| Links | https://www.imdb.com/title/tt0071537/?ref_=ttfc_fc_tt |
