Directed by
| Giorgio Ferroni | ||
Writing Credits
| Pieter van Weigen | ... | (short story) |
| Remigio Del Grosso | ... | (scenario) (french version) (uncredited) |
| Giorgio Ferroni | ... | (uncredited) |
| Ugo Liberatore | ... | (uncredited) |
| Giorgio Stegani | ... | (uncredited) |
Cast (in credits order)
| Pierre Brice | ... | Hans von Arnim | |
| Scilla Gabel | ... | Elfie Wahl | |
| Wolfgang Preiss | ... | Il dottor Loren Bohlem | |
| Dany Carrel | ... | Liselotte Kornheim (as Danny Carrell) | |
| Liana Orfei | ... | Annelore | |
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Marco Guglielmi | ... | Ralf |
| Herbert A.E. Böhme | ... | Il professore Gregorius Wahl (as Herbert Boehme) | |
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Olga Solbelli | ... | Selma |
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Alberto Archetti | ... | Konrad |
| Rest of cast listed alphabetically: | |||
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Ferdinando Baldi | ... | L'assistente del dottore |
| Carlo D'Angelo | ... | Il maggiordomo del dottore | |
| Cristina Gaioni | ... | L'amici di Liselotte | |
| Harriet Medin | ... | Marta | |
Produced by
| Giampaolo Bigazzi | ... | producer (as Gian Paolo Bigazzi) |
| Riley Jackson | ... | executive producer: US version |
| Charles Kornel | ... | producer (french version) |
| Robert Patrick | ... | executive producer: US version |
Music by
| Carlo Innocenzi | ||
Cinematography by
| Pier Ludovico Pavoni | ... | director of photography |
Editing by
| Antonietta Zita | ||
Production Design by
| Arrigo Equini | ||
Set Decoration by
| Carlo Gentili | ||
Makeup Department
| Franco Palombi | ... | makeup artist |
Production Management
| Piero Ghione | ... | production supervisor |
| Thomas Sagone | ... | production supervisor (as Tommaso Sagone) |
| Lucien Vittel | ... | production manager |
Second Unit Director or Assistant Director
| Giuliano Betti | ... | assistant director |
| Piero Braccialini | ... | second assistant director |
Sound Department
| Jacques Bonpunt | ... | sound (as J. Bonpunt) |
| Umberto Picistrelli | ... | sound (as Umberto Piscistrelli) |
Camera and Electrical Department
| Angelo Lotti | ... | camera operator |
| Renato Mascagni | ... | assistant camera |
Additional Crew
| Ettore Catalucci | ... | laboratory director (as E. Catalucci) |
| Hugo Grimaldi | ... | supervisor: US version |
| John Davis Hart | ... | script: English version |
| Richard McNamara | ... | english dubbing director |
| Nelly Benedetti | ... | french voice dubbing: Scilla Gabel (uncredited) |
| Fiorella Betti | ... | italian voice dubbing: Liana Orfei (uncredited) |
| Rosetta Calavetta | ... | italian voice dubbing: Scilla Gabel (uncredited) |
| Giorgio Capecchi | ... | italian voice dubbing: Herbert A.E. Böhme (uncredited) |
| Maria Pia Di Meo | ... | italian voice dubbing: Dany Carrel (uncredited) |
| Michel Gatineau | ... | french voice dubbing: Wolfgang Preiss (uncredited) |
| Nando Gazzolo | ... | italian voice dubbing: Pierre Brice (uncredited) |
| Jean-Louis Jemma | ... | french voice dubbing: Pierre Brice (uncredited) |
| Pierre Morin | ... | french voice dubbing: Herbert A.E. Böhme (uncredited) |
| Bruno Persa | ... | italian voice dubbing: Wolfgang Preiss (uncredited) |
| Michel Roux | ... | french voice dubbing: Marco Guglielmi (uncredited) |
| Wanda Tettoni | ... | italian voice dubbing: Olga Solbelli (uncredited) |
| Massimo Turci | ... | italian voice dubbing: Marco Guglielmi (uncredited) |