12 Angry Men is a 1957 American drama film adapted from a teleplay of the same name by Reginald Rose. Written and co-produced by Rose himself and directed by Sidney Lumet, this trial film tells the story of a jury made up of 12 men as they deliberate the guilt or acquittal of a defendant on the basis of reasonable doubt. In the United States, a verdict in most criminal trials by jury must be unanimous. The film is notable for its almost exclusive use of one set: with the exception of the film’s opening, which begins outside on the steps of the courthouse followed by the judge’s final instructions to the jury before retiring, a brief final scene on the courthouse steps, and two short scenes in an adjoining washroom, the entire movie takes place in the jury room.