A Clockwork Orange (1971)
Adapted from Anthony Burgess's best-selling novel, A Clockwork Orange tells the story of Alex and his gang of violent 'droogs' who kill tramps and rape women.
The film is infamous for the copycat behaviour it inspired - which many thought to be the reason that director Stanley Kubrick withdrew the film in the UK. After his death, his wife Christiane revealed that the actual reason he had the film banned was on the advice of the police after severe threats were made to him and his family.