One Flew Over the Cuckoo's Nest (1975)

IMDB
Genre : Drama
TRAILER
Director : Milos Forman
Stars : Jack Nicholson, Louise Fletcher, Michael Berryman, Peter Brocco
Plot : A rebellious convict is sent to a psychiatric hospital for evaluation in 1963 Oregon, and encourages his docile companions to take more control of their lives and defy the tyrannical head nurse.