Sidney Lumet is one of America's most prolific film-makers. He believes cinema is a collaborative art, and prefers to remain in his native New York to becoming a Hollywood 'star' director. In his first major television interview, Lumet looks back over his career and discusses the obsession with crime, punishment, and justice which he has explored in such classics as Twelve Angry Men, Serpico, Dog Day Afternoon - and again in his latest film, Q&A, starring Nick Nolte.