Directed by
| Riccardo Freda | ... | (as Robert Hampton) |
Writing Credits
| Ernesto Gastaldi | ... | (story) (as Julyan Perry) |
| Ernesto Gastaldi | ... | (screenplay) (as Julyan Perry) |
Cast (in credits order) complete, awaiting verification
| Barbara Steele | ... | Cynthia Hichcock | |
| Robert Flemyng | ... | Il dottor Bernard Hichcock | |
| Silvano Tranquilli | ... | Il dottor Kurt Lowe (as Montgomery Glenn) | |
| Maria Teresa Vianello | ... | Margaretha Hichcock (as Teresa Fitzgerald) | |
| Harriet Medin | ... | Martha - la domestica (as Harriet White) | |
 |
Lamberto Antinori | ... | (as Spencer Williams) |
|
|
Aldo Cristiani | ... | (as Al Christianson) |
|
|
Evaristo Signorini | ... | L'ispecttore Scott (as Evar Simpsom) |
|
|
Giovanni Querrel | ... | (as Nat Harley) |
| Rest of cast listed alphabetically: | |||
|
|
Vera Drudi | ... | Margaretha Hichcock da vecchia (uncredited) |
|
|
Neil Robinson | ... | L'assistente del dottor Hichcock (uncredited) |
|
|
Howard Nelson Rubien | ... | Il tecnico di laboratorio (uncredited) |
Produced by
| Luigi Carpentieri | ... | producer (as Louis Mann) |
| Ermanno Donati | ... | producer (as Louis Mann) |
Music by
| Roman Vlad | ||
Cinematography by
| Raffaele Masciocchi | ... | director of photography (as Donald Green) |
Editing by
| Ornella Micheli | ... | (as Donna Christie) |
Art Direction by
| Aurelio Crugnola | ... | (as Joseph Goodman) |
Set Decoration by
| Franco Fumagalli | ... | (as Frank Smokecocks) |
Costume Design by
| Italia Scandariato | ... | (as Inoa Starly) |
Makeup Department
| Anna Fabrizzi | ... | hair stylist (as Annette Winter) |
| Euclide Santoli | ... | makeup artist (as Bud Steiner) |
Production Management
| Livio Maffei | ... | production manager (as Lou D. Kelly) |
| Carlo Zanotti | ... | production supervisor (as Charles Law) |
Second Unit Director or Assistant Director
| Giovanni Fago | ... | assistant director (as John M. Farquhar) |
Art Department
| Sandro Symeoni | ... | poster designer (uncredited) |
Sound Department
| Renato Cadueri | ... | sound (as Jackson Mc Gregor) |
Camera and Electrical Department
| Antonio Schiavo Lena | ... | camera operator (as Anthony Taylor) |
Additional Crew
| René Bériard | ... | french voice dubbing: Robert Flemyng (uncredited) |
| Michel Cogoni | ... | french voice dubbing: Silvano Tranquilli (uncredited) |
| Mireille Darc | ... | french voice dubbing: Barbara Steele (uncredited) |
| Gualtiero De Angelis | ... | italian voice dubbing: Robert Flemyng (uncredited) |
| Maria Pia Di Meo | ... | italian voice dubbing: Barbara Steele (uncredited) |
| Micaela Giustiniani | ... | italian voice dubbing: Harriet Medin (uncredited) |
| Wanda Tettoni | ... | italian voice dubbing: Maria Teresa Vianello (uncredited) |
