Directed by
| John Clements | ||
| Ladislao Vajda | ||
Writing Credits (in alphabetical order)
| John Clements | ... | (writer) |
| Robert Hichens | ... | (novel) |
| Basil Mason | ... | (treatment) |
| Fabrizio Sarazani | ... | (adaptation) (uncredited) |
| Ákos Tolnay | ... | (writer) |
Cast (in credits order) complete, awaiting verification
| Kay Hammond | ... | Dr. Anne Lester | |
| John Clements | ... | Julius Ikon | |
| John Justin | ... | David Erskine | |
| Hilton Edwards | ... | Dr. Robert Blake | |
| Robert Rietty | ... | Gaspare | |
| Carlo Ninchi | ... | Salvatore | |
| Lea Padovani | ... | Maddelena | |
 |
Jelo Filippo | ... | Sebastiono |
|
|
H.G. Stoker | ... | Uncle Ben |
| Keith Pyott | ... | Dr. Sabatier | |
|
|
Marcesa Faciacani | ... | Lucretia |
| Rest of cast listed alphabetically: | |||
|
|
Kathleen Hammond | ||
|
|
Giulio Donnini | ... | Bit part (uncredited) |
|
|
Marisa Fimiani | ... | Uncredited (uncredited) |
| Dora Gregory | ... | Landlady (uncredited) | |
| Eliot Makeham | ... | Laboratory assistant (uncredited) | |
| Michael Medwin | ... | Medical student (uncredited) | |
Produced by
| Steven Pallos | ... | producer |
| John Stafford | ... | producer |
Music by
| Ludovico Lunghi | ||
Cinematography by
| Ubaldo Arata | ||
| Wilkie Cooper | ||
Editing by
| Carmen Beliaeff | ||
Art Direction by
| Maurice Fowler | ||
Costume Design by
| Elizabeth Haffenden | ||
Makeup Department
| Eileen Bates | ... | hairdresser (uncredited) |
Production Management
| Harold Richmond | ... | production manager |
| Valentino Bruchi | ... | director of production (uncredited) |
Second Unit Director or Assistant Director
| Paul Kelly | ... | assistant director |
Sound Department
| Franco Robecchi | ... | sound |
| W.H.O. Sweeney | ... | sound |
Costume and Wardrobe Department
| Maria De Matteis | ... | costumes (uncredited) |
