AllMovie

The "nick" in this standard prison farce is a modernistic, forward-looking jail without bars. At its core of staff are dedicated young psychologist Dr. Newcombe (Anthony Newley) and tough-minded but fair overseer Chief Officer Williams (Harry Andrews). Their jobs are made that much more difficult when four hardened criminals are inexplicably sent to the minimum security prison. The leader of this gang of four is Spider (James Booth) whose main job is to rally his cohorts into defeating a rival gang and lording it over other inmates. Their tactics and the efforts of the good doctor to reform them provide the comic fodder for the film.