The French Connection (William Friedkin, US, 1971)

frenchconnection
To watch The French Connection now is to experience the shock of the old: a lost world of the city, and a lost style of filmmaking.
— Peter Bradshaw, The Guardian

Gene Hackman and Roy Schneider star as a pair of New York police detectives investigating a heroin-smuggling network originating in France. A tense, gripping and truly gritty thriller that is easily one of the finest films produced by the New Hollywood of the 1970s. Winner of 5 Academy Awards, including Best Picture, Best Actor and Best Director. 

Quiz winners' choice.