| Directed by |
Umberto Lenzi |
|
| Screenplay by |
Umberto Lenzi |
|
| Story by |
Umberto Lenzi Edgar Wallace |
|
| Based on a novel by |
Cornell Woolrich |
|
| Cast: | ||
| Giulia Torresi | Uschi Glas | |
| Elena Marchi | Rosella Falk | |
| Raffaele Ferri | Claudio Gora | |
| Concetta De Rosa | Petra Schürmann | |
| Agent | Fulvio Mingozzi | |
| Anna Sartori / Maria Sartori | Marisa Mell | |
| Wanda (voice) | Cicely Browne | |
| Raffaele Ferri (voice) | Hans W. Hamacher | |
| Lt. Palumbo (voice) | Klaus Miedel | |
| Edgar Wallace (voice) (archive footage) | Alfred Vohrer | |
| Year: | 1972 | |
| Country: | Italy West Germany | |
| Language: | Italian | |