A psychologist is sent to a station orbiting a distant planet in order to discover what has caused the crew to go insane.
This is not a sci-fi, this is a psychological drama in a sci-fi setting. Tarkovski does a very good job transposing Stanislav Lem’s book onto film, and it’s one of his best movies ever. However, being Tarkovsky, it’s exceptionally slow burning to the point where it gets boring. Three popcorns.