Directed by
| Mario Bava | ||
Writing Credits
| Santiago Moncada | ... | (screenplay) |
| Mario Bava | ... | (screenplay) (uncredited) |
| Laura Betti | ... | (screenplay) (uncredited) |
| Mario Musy Glori | ... | (screenplay) (uncredited) |
Cast (in credits order) complete, awaiting verification
| Stephen Forsyth | ... | John Harrington | |
| Dagmar Lassander | ... | Helen Wood | |
| Laura Betti | ... | Mildred Harrington | |
| Jesús Puente | ... | Inspector Russell (as Jesus Puente) | |
| Femi Benussi | ... | Alice Norton | |
| Antonia Mas | ... | Louise | |
| Luciano Pigozzi | ... | Vences (as Alan Collin) | |
| Gérard Tichy | ... | Dr. Kalleway (as Gerard Tichy) | |
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Verónica Llimerá | ... | Betsy Wester (as Veronica Llimera) |
| Pasquale Fortunato | ... | John Harrington as a Boy (as Fortunato Pascuale) | |
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Ignasi Abadal | ... | Jimmy Kane (as José Ignacio Abadaz) |
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Silvia Lienas | ... | Vicky |
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Montserrat Riba Vidal | ... | Rosy Miller (as Monserrat Riba) |
| Rest of cast listed alphabetically: | |||
| Susy Andersen | ... | Sdenka (archive footage) (uncredited) | |
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Guido Barlocci | ... | Unknown (uncredited) |
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Bruno Boschetti | ... | Policeman (uncredited) |
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Elina De Witt | ... | Model (uncredited) |
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Rika Dialyna | ... | Maria (archive footage) (uncredited) |
| Boris Karloff | ... | Gorca (archive footage) (uncredited) | |
| Glauco Onorato | ... | Giorgio (archive footage) (uncredited) | |
Produced by
| Manuel Caño | ... | producer |
| Enzo Ferla | ... | assistant producer |
| Giuseppe Zaccariello | ... | producer (uncredited) |
Music by
| Sante Maria Romitelli | ... | (as Sante Romitelli) |
Cinematography by
| Mario Bava | ... | director of photography |
| Antonio Rinaldi | ... | (uncredited) |
Editing by
| Soledad López | ... | (as Soledad Lopez) |
Production Design by
| Giulia Mafai | ... | (uncredited) |
Costume Design by
| José María Tresserra | ... | (as Jose Mª Tresserra) |
Makeup Department
| Elisa Aspachs | ... | makeup artist (as Elisa Aspach) |
| Hipólita López | ... | hair stylist (as Hipolita Lopez) |
| Piero Mecacci | ... | makeup artist |
| Emilia Zachini | ... | hair stylist |
Production Management
| Graziano Fabiani | ... | assistant production manager (as Graciano Fabiani) |
| Enzo Ferla | ... | unit production manager |
| Jaime Fernandez | ... | production manager (as Jaime Fernandez Cid) |
| José Pedro Villanueva | ... | assistant production manager (as Pedro Villanueva) |
Second Unit Director or Assistant Director
| Lamberto Bava | ... | assistant director |
| Ricardo Walker | ... | assistant director |
| Lamberto Bava | ... | second unit director (uncredited) |
| Mario Bianchi | ... | assistant director: second unit (uncredited) |
Art Department
| Jesus Maria Herrero | ... | set designer (as Jesus Mª Herrero) |
| Giuseppe Aldrovandi | ... | assistant art director (uncredited) |
| Gianna Spirito | ... | assistant decorator (uncredited) |
Sound Department
| Pietro Ortolani | ... | sound (uncredited) |
Camera and Electrical Department
| Jose Adrian | ... | still photographer |
| Marcello Anconetani | ... | assistant camera |
| Gianlorenzo Battaglia | ... | assistant camera (as Gian Lorenzo Battaglia) |
| Avelino Carla | ... | assistant camera |
| Jaime Deu Casas | ... | camera operator |
| Giuseppe Parrabano | ... | still photographer |
| Emilio Varriano | ... | camera operator (as Emilio Barriano) |
| Mario Bava | ... | camera operator (uncredited) |
| Antonio Rinaldi | ... | camera operator (uncredited) |
Costume and Wardrobe Department
| José María Tresserra | ... | bridal gowns (as Jose Mª Tresserra) |
| Nadia Fabriani | ... | set costumer (uncredited) |
| Montserrat Riba Vidal | ... | bridal gowns (uncredited) |
Editorial Department
| Liliana Serra | ... | assistant editor (uncredited) |
Music Department
| Luigi Zito | ... | conductor (uncredited) |
Script and Continuity Department
| Patrizia Zulini | ... | script supervisor |
| Marisa Agostini | ... | script supervisor (uncredited) |
Additional Crew
| N.W. Russo | ... | presenter |
| Félix Acaso | ... | voice dubbing: Stephen Forsyth (uncredited) |
| Antonio Angrisano | ... | production secretary (uncredited) |
| Francisco Arenzana | ... | voice dubbing (uncredited) |
| Salvador Arias | ... | voice dubbing: Gérard Tichy (uncredited) |
| Mario Bava | ... | title designer (uncredited) |
| Luigi Biamonte | ... | title designer (uncredited) |
| Lola Cervantes | ... | voice dubbing: Laura Betti (uncredited) |
| Rodd Dana | ... | voice dubbing (English version) (uncredited) |
| Miro Grisanti | ... | title designer (uncredited) |
| Edward Mannix | ... | voice dubbing (English version) (uncredited) |
| Manuel Peiró | ... | voice dubbing (uncredited) |
| María Luisa Rubio | ... | voice dubbing: Dagmar Lassander (uncredited) |
| Mayte Santamarina | ... | voice dubbing: Femi Benussi (uncredited) / voice dubbing: Verónica Llimerá (uncredited) |
| Mel Welles | ... | dialogue director: English version (uncredited) |
