Act 1

Twelve Angry Men takes place in a jury room in the late afternoon on a hot summer's day in New York City. After the curtain rises, the judge's voice is heard offstage, giving instructions to the jury. He says that the defendant is being tried for first-degree murder, which carries a mandatory death penalty. The judge adds that if the jury has reasonable doubt about the guilt of the accused, they must acquit him. The verdict must be unanimous.

The jurors, all men, file into the jury room and sit in straight-backed chairs around a long conference table. The weather is hot, and there is no air-conditioning; some of the men are irritable. From the initial chitchat, it is clear that most members of the jury regard the man as guilty. Jurors Seven and Ten ridicule the defendant's story. Apparently, a young man has stabbed his father...