12 Angry Men, directed by Sidney Lumet, may be the most radical courtroom drama in cinema history. A behind-closed-doors look at the American legal system that is as riveting as it is spare, this iconic adaptation of Reginald Rose's teleplay stars Henry Fonda as the dissenting member on a jury of white men ready to pass judgment on a Puerto Rican teenager charged with murdering his father. The result is a saga of epic proportions that plays out over a tense afternoon in one sweltering room. Lumet's electrifying snapshot of 1950s America on the verge of change is one of the great feature-film debuts.