Directed by
| Mario Bava | ||
Writing Credits
| Willibald Eser | ... | (story) & |
| Mario Bava | ... | (story) |
| Willibald Eser | ... | (screenplay) & |
| Mario Bava | ... | (screenplay) |
| Vincent Fotre | ... | (original story) (English version) |
| Vincent Fotre | ... | (screenplay) (English version) |
| William A. Bairn | ... | (adapted for the screen by) (English version) |
Cast (in credits order) verified as complete
| Joseph Cotten | ... | Baron Otto von Kleist / Alfred Becker | |
| Elke Sommer | ... | Eva Arnold | |
| Massimo Girotti | ... | Dr. Karl Hummel | |
| Luciano Pigozzi | ... | Fritz (as Alan Collins) | |
| Antonio Cantafora | ... | Peter Kleist | |
| Umberto Raho | ... | Inspector (as Humi Raho on US prints) | |
| Nicoletta Elmi | ... | Gretchen Hummel | |
| Dieter Tressler | ... | Mayor Dortmundt | |
 |
Rolf Halwich | ... | Auctioner |
| Gustavo De Nardo | ... | Dr. Werner Hesse | |
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Valeria Sabel | ... | Martha Hummel |
|
|
Irio Fantini | ||
| Rada Rassimov | ... | Christina Hoffmann / Elizabeth Hölle | |
| Rest of cast listed alphabetically: | |||
| Lamberto Bava | ... | Man at Airport (uncredited) | |
| Mario Bava | ... | Man Passing by the Castle (uncredited) | |
| Pilar Castel | ... | Madeleine (uncredited) | |
| Alfredo Leone | ... | Aircraft Passenger (uncredited) | |
|
|
Kathleen Leone | ... | Aircraft Passenger (uncredited) |
| Maurice Poli | ... | Land Surveyor (uncredited) | |
| Franco Tocci | ... | Baron Otto von Kleist - as a Corpse (uncredited) | |
Produced by
| Samuel Z. Arkoff | ... | executive producer (US version) (uncredited) |
| J. Arthur Elliot | ... | executive producer |
| Dieter Geissler | ... | co-producer (uncredited) |
| Sam Lang | ... | executive producer |
| Alfredo Leone | ... | producer (as Alfred Leone) |
Music by
| Les Baxter | ... | (US version) |
| Stelvio Cipriani | ||
Cinematography by
| Antonio Rinaldi | ... | director of photography |
| Mario Bava | ... | (uncredited) |
Editing by
| Carlo Reali | ||
Production Design by
| Enzo Bulgarelli | ||
| Fritz Jüptner-Jonstorff | ... | (as Friedrich Jüptner) |
Art Direction by
| Enzo Bulgarelli | ||
Set Decoration by
| Stefano Bulgarelli | ||
Costume Design by
| Enzo Bulgarelli | ||
| Fritz Jüptner-Jonstorff | ... | (as Friedrich Jüptner) |
Makeup Department
| Rossana Gigante | ... | hair stylist |
| Silvana Petri | ... | makeup artist |
| Carlo Rambaldi | ... | special makeup effects artist (uncredited) |
Production Management
| Pierluigi Ciriaci | ... | production inspector |
| Franco Coduti | ... | production inspector |
| Richard Deutsch | ... | production manager |
| Bruno Frascà | ... | production manager |
| Salvatore Billitteri | ... | post-production supervisor: US version (uncredited) |
Second Unit Director or Assistant Director
| Lamberto Bava | ... | assistant director |
| Giuseppe Scavuzzo | ... | assistant director |
Art Department
| Mario Bava | ... | paintings (uncredited) |
Sound Department
| Carlo Tarchi | ... | sound |
Special Effects by
| Franco Tocci | ... | special effects |
| Mario Bava | ... | special effects (uncredited) |
Camera and Electrical Department
| Gianlorenzo Battaglia | ... | assistant camera |
| Francesco Bellomo | ... | still photographer |
| Angelo Coacci | ... | grip |
| Antonio Rinaldi | ... | lighting |
| Emilio Varriano | ... | camera operator |
Costume and Wardrobe Department
| Alfonsa Olivieri | ... | seamstress |
Editorial Department
| Anita Cacciolati | ... | assistant editor |
| Salvatore Billitteri | ... | additional editor: US version (uncredited) |
Music Department
| Stelvio Cipriani | ... | musical director |
Script and Continuity Department
| Marion Mertes | ... | script supervisor |
Additional Crew
| Ermida Aichino | ... | production secretary (as Armida Aichino) |
| Giulio Maculani | ... | master of arms |
| Marina Oberreiter | ... | interpreter |
| William A. Bairn | ... | dialogue coach (uncredited) |
| Germana Dominici | ... | voice dubbing: Pilar Castle (uncredited) |
| Vittoria Febbi | ... | voice dubbing: Elke Sommer (uncredited) |
| Nando Gazzolo | ... | voice dubbing: Umberto Raho (uncredited) |
| Bruno Persa | ... | voice dubbing: Joseph Cotten (uncredited) |
| Giuseppe Rinaldi | ... | voice dubbing: Massimo Girotti (uncredited) |
| Emanuela Rossi | ... | voice dubbing: Nicoletta Elmi (uncredited) |
| Alessandro Sperli | ... | voice dubbing: Gustavo De Nardo (uncredited) |
| Massimo Turci | ... | voice dubbing: Antonio Cantafora (uncredited) |
| Mel Welles | ... | dialogue director: English version (uncredited) |
