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 | Marie Claire Solleville | Writer |
| Writing | Ugo Moretti | Writer |
| Writing | Umberto Lenzi | Writer |
| Directing | Umberto Lenzi | Director |
| Art | Giorgio Bertolini | Art Direction |
| Camera | Guglielmo Mancori | Director of Photography |
| Production | Salvatore Alabiso | Producer |
| Editing | Enzo Alabiso | Editor |
| Sound | Piero Umiliani | Original Music Composer |
| 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 |
