Following the death of her wealthy husband, American widow Kathryn West migrates to Italy and takes up a reclusive existence in a luxurious villa. After quickly succumbing to the charms of a local man, she lets him move into the villa and the two are later joined by his sister, which soon leads to complications.
Unfortunately the movie Paranoia is not yet available on HBO Max.
| Writing | Ugo Moretti | Writer |
| Writing | Umberto Lenzi | Writer |
| Writing | Marie Claire Solleville | Writer |
| Directing | Umberto Lenzi | Director |
| Sound | Piero Umiliani | Original Music Composer |
| Art | Giorgio Bertolini | Art Direction |
| Production | Salvatore Alabiso | Producer |
| Camera | Guglielmo Mancori | Director of Photography |
| Editing | Enzo Alabiso | Editor |
| Directing | Bertrand Tavernier | Assistant Director |
| Costume & Make-Up | Iolanda Conti | Hairstylist |
| Costume & Make-Up | Raul Ranieri | Makeup Artist |
| Production | Adriano Merkel | Production Manager |
| Directing | Marcello Pandolfi | Assistant Director |
| Sound | Pietro Spadoni | Sound |
| Sound | Carlo Spagnardi | Boom Operator |
| Camera | Mario Sbrenna | Camera Operator |
| Editing | Claudio S. Loutfy | Assistant Editor |
