Carroll Baker plays a dual role as translator Julie Harrison and her twin sister Mary. The serpentine plot begins as Julie tells her lawyer Dave Barton that Mary's life is being threatened in London while Julie herself is being stalked by a mysterious stranger in Amsterdam.
Unfortunately the movie The Devil with Seven Faces is not yet available on HBO Max.
| Camera | Walter Civirani | Director of Photography |
| Writing | Tito Carpi | Writer |
| Writing | Osvaldo Civirani | Writer |
| Sound | Stelvio Cipriani | Original Music Composer |
| Directing | Osvaldo Civirani | Director |
| Production | Osvaldo Civirani | Producer |
| Editing | Mauro Contini | Editor |
| Art | Giorgio Postiglione | Art Direction |
| Costume & Make-Up | Iolanda Conti | Hairstylist |
| Costume & Make-Up | Marcello Di Paolo | Makeup Artist |
| Costume & Make-Up | Marisa Manici | Makeup Artist |
| Production | Graziano Fabiani | Production Manager |
