One Flew Over the Cuckoo's Nest

This is the first movie since "It Happened One Night," which came out in the 1930s, to win all five major Academy Awards (best picture, best director, best actor, best actress, and best screenplay). It's about a rabble-rousing convict (Jack Nickolson) who gets himself admitted to a mental hospital in order to escape finishing out his sentence on a work detail, only to find himself on a unit where Nurse Ratched (Louise Fletcher) works at slowly destroying her charges rather than helping them. After some hilarious and horrifying twists and turns, the real hero of the story finally emerges at the very end.

One Flew Over the Cuckoo's Nest leaves you with a fresh appreciation of the kinds of psychological destructiveness which may be committed by people who, to all intents and purposes, are well-meaning and competent members of society -- even, perhaps, by members of one's own family.
It would be a good subject for discussion as a form of cinematherapy with clients who have had a brush with either the correctional or the mental health system. (After some initial doubts, I watched it with my "Psyching Out the Movies" group in the in-patient psychiatric unit of a super-max State prison -- and we are going to have a lot to talk about!)