First Monday in October (Ronald Neame, dir.) (1980). This film tells the story of two fictional justices of the U.S. Supreme Court.
My Cousin Vinny (Jonathan Lynn, dir.) (1992). A comedy, this film centers on a small-town criminal trial and the aspiring lawyer who serves as defense counsel; in the process, the film illustrates many aspects of courtroom procedure.
Twelve Angry Men (Sidney Lumet, dir.) (1957). This classic film takes the viewer inside a jury room, as jurors struggle with the question of guilt or innocence in a trial.