Directed by
| Riccardo Freda | ... | (as Robert Hampton) |
Writing Credits
| Romano Migliorini | ... | (story) and |
| Gianbattista Mussetto | ... | (story) and |
| Lucio Fulci | ... | (story) |
| Riccardo Freda | ... | (screenplay) (as Robert Hampton) and |
| Paul Hengge | ... | (screenplay) |
| Edgar Wallace | ... | (novel) |
Cast (in credits order) complete, awaiting verification
| Klaus Kinski | ... | John Alexander | |
| Christiane Krüger | ... | Christine | |
| Günther Stoll | ... | Inspector Stevens | |
| Annabella Incontrera | ... | Liz | |
| Sydney Chaplin | ... | Mr. Brown | |
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Barbara Nelli | ... | Alice |
| Margaret Lee | ... | Helen Brown / Helen Alexander | |
| Gastone Pescucci | ... | Peter | |
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Claudio Trionfi | ||
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Luciano Spadoni | ... | Inspector Gordon |
| Ignazio Dolce | ... | (as Ignazio Dolci) | |
| Rest of cast listed alphabetically: | |||
| Alice Arno | ... | (hardcore inserts - French 1976 version) | |
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Carlo Marcolino | ... | Servant |
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Bedy Moratti | ... | (uncredited) |
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Fulvio Pellegrino | ... | Policeman (uncredited) |
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Domenico Ravenna | ... | Horserace Spectator (uncredited) |
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Alfred Vohrer | ... | Edgar Wallace (voice) (archive footage) (uncredited) |
Produced by
| Oreste Coltellacci | ... | producer |
| Horst Wendlandt | ... | producer (uncredited) |
Music by
| Nora Orlandi | ... | (as Joan Christian) |
Cinematography by
| Gábor Pogány | ||
Editing by
| Anna Amedei | ||
| Jutta Hering | ||
Production Design by
| Luciano Spadoni | ||
Costume Design by
| Luciano Spadoni | ||
Makeup Department
| Vittorio Biseo | ... | makeup artist |
| Emilia Foschini | ... | hair stylist |
Production Management
| Antonio Girasante | ... | production manager |
| Albino Morandin | ... | production manager (as Albino Morandini) |
| Killian Robentrop | ... | production manager |
Second Unit Director or Assistant Director
| Ignazio Dolce | ... | assistant director |
| Eva Ebner | ... | assistant director |
Art Department
| Umberto Turco | ... | assistant production designer |
Sound Department
| Carlo Diotavelli | ... | sound engineer |
| Hubertus Schmandtke | ... | sound (as Hubertus Schmandke) |
| Alessandro Biancani | ... | audio restorer (uncredited) |
| Pierluigi Scarpantonio | ... | audio restorer (uncredited) |
Special Effects by
| Eros Bacciucchi | ... | special effects (as Bacciucchi) |
Camera and Electrical Department
| Mario Lommi | ... | assistant camera |
| Angelo Pennoni | ... | still photographer |
| Cristiano Pogany | ... | assistant camera |
| Idelmo Simonelli | ... | camera operator |
| Sabino Tonti | ... | assistant camera |
Costume and Wardrobe Department
| Vera Ceffarelli | ... | wardrobe mistress |
| Francesca Panicali | ... | assistant costume designer (as Francesca Romana Panicali) |
Editorial Department
| Rosanna Coppola | ... | assistant editor |
Music Department
| Nora Orlandi | ... | songs sung by (as Silvie St Laurent) |
| Robby Poitevin | ... | conductor |
Script and Continuity Department
| Maria Pia Rocco | ... | script supervisor |
| Vivalda Vigorelli | ... | script supervisor |
Additional Crew
| Innocente Cicaga | ... | production secretary |
| Giuliano Principato | ... | production secretary |
| Fiorella Betti | ... | voice dubbing: Christiane Krüger (uncredited) |
| Manlio Busoni | ... | voice dubbing: Günther Stroll (uncredited) |
| Geoffrey Copleston | ... | voice dubbing: Luciano Spadoni (english version) (uncredited) |
| Carlo D'Angelo | ... | voice dubbing: Sydney Chaplin (uncredited) |
| Arturo Dominici | ... | voice dubbing: Luciano Spadoni (uncredited) |
| Sergio Graziani | ... | voice dubbing: Klaus Kinski (uncredited) |
| Ursula Herwig | ... | voice dubbing: Christiane Krüger (uncredited) |
| Oreste Lionello | ... | voice dubbing: Gastone Pescucci (uncredited) |
| Melina Martello | ... | voice dubbing: Annabella Incontrera (uncredited) |
| Benita Martini | ... | voice dubbing: Margaret Lee (uncredited) |
