Adapted from Ken Kesey’s novel, the film centres on Randle McMurphy (Jack Nicholson), a convict who simulates mental illness in the hope that a transfer to psychiatric hospital might ensure his early release. But he hasn’t bargained for the rigid regimen of Nurse Ratched (Louise Fletcher, also superb), who dislikes his disruptive — though he’d say liberating — effect on the ward.

One Flew Over the Cuckoo’s Nest is in cinemas from Friday.