| Person | Type | Job | Role(s) |
|---|---|---|---|
 Adriana Spadaro | Crew | Costume & Make-Up | Costume Design |
Alfredo Tiberi | Crew | Costume & Make-Up | Makeup Artist |
Antonio Millán | Crew | Camera | Director of Photography |
 Bruno Nicolai | Crew | Sound | Original Music Composer |
Félix Tusell | Crew | Writing | Screenplay, Story |
José María Cunillés | Crew | Production | Co-Producer |
Mario Di Salvio | Crew | Costume & Make-Up | Makeup Artist |
 Umberto Lenzi | Crew | Writing | Screenplay, Director, Story |
Francesco Narducci | Crew | Camera | Still Photographer |
José Massagué | Crew | Art | Set Designer |
Joseph Brenner | Crew | Production | Producer |
Amedeo Moriani | Crew | Editing | Editor |
 Andrés Mejuto | Cast | Actor | Inspector Tudela |
 Carolyn De Fonseca | Cast | Actress | Gail Alvarado (voice) |
 Daniele Vargas | Cast | Actor | Robby Alvarado |
 Fulvio Mingozzi | Cast | Actor | Policeman |
 George Rigaud | Cast | Actor | Rev. Bronson |
 Ines Pellegrini | Cast | Actress | Naiba Campbell |
 John Bartha | Cast | Actor | Mr. Hamilton |
 John Richardson | Cast | Actor | Mark Burton |
 José María Blanco | Cast | Actor | Inspector Lara |
 Laura Trotter | Cast | Actress | Murder Victim at Castle (uncredited) |
 Lorenzo Piani | Cast | Actor | |
 Marta May | Cast | Actress | Alma Burton |
 Martine Brochard | Cast | Actress | Paulette Stone |
 Mirta Miller | Cast | Actress | Lisa Sanders |
 Nestore Cavaricci | Cast | Actor | Policeman (uncredited) |
Olga Pehar | Cast | Mrs. Randall | |
 Raf Baldassarre | Cast | Actor | Martinez - the tour guide |
 Silvia Solar | Cast | Actress | Gail Alvarado |
 Tom Felleghy | Cast | Actor | Coroner |
 Verónica Miriel | Cast | Actress | Jenny Hamilton |
 Vittorio Fanfoni | Cast | Actor | |
 Richard Kolin | Cast | Actor | Mr. Randall |
Francesco Narducci | Cast | Actor | Receptionist at Hotel Presidente |
 Rina Mascetti | Cast | Actress | Hospital Nurse |
 Olga Montes | Cast | Actress | |
| Person | Type | Job | Role(s) |
