Directed by
| Mario Bava | ||
Writing Credits
| Ennio De Concini | ... | (screenplay) & |
| Mario Serandrei | ... | (screenplay) |
| Nikolay Gogol | ... | (from a tale by) (as Nikolaj Gogol) |
| George Higgins | ... | (English dialogue written by) (as George Higgins III) |
| Mario Bava | ... | (screenplay) (uncredited) |
| Marcello Coscia | ... | (screenplay) (uncredited) |
| Dino De Palma | ... | (screenplay) (uncredited) |
Cast (in credits order) verified as complete
| Barbara Steele | ... | Princess Asa Vajda / Katia Vajda (as Barbara Steel) | |
| John Richardson | ... | Dr. Andrej Gorobec / Dr. Andreas Gorobec | |
| Andrea Checchi | ... | Dr. Choma Kruvajan / Dr. Thomas Kruvajan | |
| Ivo Garrani | ... | Prince Vajda | |
| Arturo Dominici | ... | Igor Javutich / Javuto | |
| Enrico Olivieri | ... | Constantine Vajda | |
 |
Antonio Pierfederici | ... | Priest |
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Tino Bianchi | ... | Ivan - Manservant |
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Clara Bindi | ... | Innkeeper |
| Mario Passante | ... | Nikita - Coachman | |
| Renato Terra | ... | Boris - Stablehand | |
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Germana Dominici | ... | Sonya - Innkeeper's Daughter |
| Rest of cast listed alphabetically: | |||
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Nando Gazzolo | ... | Narrator (voice) (uncredited) |
Produced by
| Samuel Z. Arkoff | ... | executive producer (US version) (uncredited) |
| Massimo De Rita | ... | producer |
| James H. Nicholson | ... | executive producer (US version) (uncredited) |
| Lou Rusoff | ... | producer (US version) |
| Lionello Santi | ... | executive producer (uncredited) |
Music by
| Les Baxter | ... | (US version) |
| Roberto Nicolosi | ||
Cinematography by
| Mario Bava | ... | (photography) |
Editing by
| Mario Serandrei | ||
Production Design by
| Giorgio Giovannini | ||
Set Decoration by
| Nedo Azzini | ||
Costume Design by
| Tina Grani | ... | (as Tina Loriedo Grani) |
Production Management
| Paolo Mercuri | ... | production supervisor |
Second Unit Director or Assistant Director
| Vana Caruso | ... | assistant director (as Vano Caruso) |
Art Department
| Mario Bava | ... | paintings (uncredited) |
Sound Department
| Robert Sherwood | ... | sound: US version |
Special Effects by
| Eugenio Bava | ... | sculptor: masks and faces (uncredited) |
| Mario Bava | ... | matte paintings (uncredited) / special effects (uncredited) |
Camera and Electrical Department
| Ubaldo Terzano | ... | camera operator |
| Antonio Rinaldi | ... | gaffer (uncredited) |
Editorial Department
| Salvatore Billitteri | ... | additional editor (US version) |
Music Department
| Al Simms | ... | music coordinator (US version) |
| Luigi Urbini | ... | conductor (as Pierluigi Urbini) |
Script and Continuity Department
| Bona Magrini | ... | script supervisor |
Additional Crew
| Samuel Z. Arkoff | ... | presenter: US version |
| Armando Govoni | ... | production secretary |
| George Higgins | ... | dialogue director: english version (as George Higgins III) |
| Lee Kresel | ... | dubbing director: US version |
| Gisella Mathews | ... | synchronization assistant (english version) |
| James H. Nicholson | ... | presenter: US version |
| Gino Baghetti | ... | voice dubbing: Tino Bianchi (uncredited) |
| Giorgio Capecchi | ... | voice dubbing (uncredited) |
| Emilio Cigoli | ... | voice dubbing: Andrea Checchi (uncredited) |
| Maria Pia Di Meo | ... | voice dubbing: Barbara Steele as Katia (uncredited) |
| Peter Fernandez | ... | voice dubbing: Enrico Olivieri (US version) (uncredited) |
| George Gonneau | ... | voice dubbing: Narrator (US version) (uncredited) |
| Joyce Gordon | ... | voice dubbing: Barbara Steele (English version) (uncredited) |
| Bernie Grant | ... | voice dubbing: John Richardson (US version) (uncredited) |
| Flaminia Jandolo | ... | voice dubbing: Clara Bindi (uncredited) |
| Bret Morrison | ... | voice dubbing: Ivo Garrani (US version) (uncredited) |
| Corinne Orr | ... | voice dubbing: Germana Dominici (US version) (uncredited) |
| Giuseppe Rinaldi | ... | voice dubbing: John Richardson (uncredited) |
| Lydia Simoneschi | ... | voice dubbing: Barbara Steele as Asa (uncredited) |
| Vinicio Sofia | ... | voice dubbing: Mario Passante (uncredited) |
| Massimo Turci | ... | voice dubbing: Enrico Olivieri (uncredited) |
