Sidney Lumet's 1973 crime drama Serpico remains one of the most influential cop movies - alongside Al Pacino's nuanced performance in a disturbing portrait of corruption and morality in the city that never sleeps.

A plainclothes street patrolman, Frank Serpico (Pacino) might be the best cop in New York, but he is unwilling to play dirty and give into police corruption of drugs, violence, and kickbacks his colleagues indulge in every day. When he decides to expose those around him, Frank finds himself a target, not just to the city's criminals, but his own peers.

Shot on location and based on real events, Serpico captures the grit of New York in a way no film has rivalled, not just for its toned down realism, but also the bleakness Lumet portrays within his hometown city with brutal cynicism with frank immediacy.