Theorem (1968) is a Mystery, Drama film that follows 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. Currently, you can watch Theorem on Criterion Channel, Amazon Video, Apple TV Store, Google Play Movies. Streaming availability may vary by country and platform over time. It has a user rating of 7.0 out of 10 from 440 votes. Fans of mystery movies may also want to explore similar titles below.