| Person | Type | Job | Role(s) |
|---|---|---|---|
 Augusto Boué | Crew | Production | Producer |
Federico Canudas | Crew | Production | Production Secretary |
Fernando Florido | Crew | Costume & Make-Up | Makeup Artist |
 Fernando García Morcillo | Crew | Sound | Original Music Composer |
Germán Monzó | Crew | Production | Producer |
José Antonio Rojo | Crew | Editing | Editor |
Julio Burgos | Crew | Crew | Cinematography |
 Paul Naschy | Crew | Directing | Director, Screenplay, Producer |
 Salvador Sáinz | Crew | Writing | Screenplay |
Tony Pueo | Crew | Art | Art Direction |
Emilio A. Pina | Crew | Production | Assistant Production Manager |
Carlos Rojo | Crew | Editing | Assistant Editor |
Francisco García San José | Crew | Crew | Special Effects |
Emilio Ruiz | Crew | Camera | Still Photographer |
Juan Antonio Cobo | Crew | Camera | Assistant Camera |
Enrique Serrano | Crew | Editing | Assistant Editor |
Carmen Plate | Cast | Woman | |
 Caroline Munro | Cast | Actress | Carmen |
 Cris Huerta | Cast | Actor | Zacarías |
 Fernando Hilbeck | Cast | Actor | Father Damián |
 Howard Vernon | Cast | Actor | Eric |
 Isabel Prinz | Cast | Actress | Lorena |
 Mabel Ordóñez | Cast | Actress | Lola |
 Malena Gracia | Cast | Actress | Woman (uncredited) |
 Mariano Vidal Molina | Cast | Actor | Civil Guard |
Paul Naschy | Cast | Actor | Hector Doriani / Alex Doriani / Frankenstein's Monster / Mr. Hyde / Phantom of the Opera / Waldemar Daninsky the Werewolf / Quasimodo / The Devil |
Roberta Kuhn | Cast | ||
Joseph Garco | Cast | Biker Robber | |
Emilio A. Pina | Cast | Civil Guard 2 | |
Sergio Molina | Cast | Actor | Adrián (as Serge Mills) |
Tamara Greys | Cast | Bridgett | |
Nuria Lucas | Cast | Robber Girl | |
Chema Gómez | Cast | (uncredited) | |
Pascual Marco | Cast | ||
| Person | Type | Job | Role(s) |
