A wealthy Italian household is turned upside down when a handsome stranger arrives, seduces every family member and then disappears. Each has an epiphany of sorts, but none can figure out who the seductive visitor was or why he came.
You can now watch Theorem online on the following streaming providers in the United States.
| Directing | Pier Paolo Pasolini | Director |
| Production | Manolo Bolognini | Producer |
| Production | Franco Rossellini | Producer |
| Sound | Ennio Morricone | Original Music Composer |
| Camera | Giuseppe Ruzzolini | Director of Photography |
| Editing | Nino Baragli | Editor |
| Art | Luciano Puccini | Production Design |
| Costume & Make-Up | Marcella De Marchis | Costume Design |
| Directing | Vanda Tuzzi | Script Supervisor |
| Camera | Otello Spila | Camera Operator |
| Costume & Make-Up | Maria Teresa Corridoni | Key Hair Stylist |
| Costume & Make-Up | Goffredo Rocchetti | Makeup Artist |
| Costume & Make-Up | Manlio Rocchetti | Makeup Artist |
| Sound | Fausto Ancillai | Sound Mixer |
| Costume & Make-Up | Roberto Capucci | Costume Design |
| Camera | Angelo Novi | Still Photographer |
| Writing | Pier Paolo Pasolini | Screenplay |
| Production | Paolo Frascà | Production Manager |
| Directing | Sergio Citti | Assistant Director |
| Art | Dario Fronzetti | Set Designer |
| Sound | Bernardino Fronzetti | Sound |
| Sound | Gianni Zampagni | Boom Operator |
| Camera | Giuseppe Buonaurio | Assistant Camera |
| Camera | Luigi Conversi | Assistant Camera |
| Sound | Bruno Nicolai | Music Director |
| Production | Sergio Galiano | Production Secretary |
