James McKay is a fictional character from the 1958 film Twelve Angry Men, directed by Sidney Lumet. He is portrayed as a juror who plays a crucial role in the deliberation process of a murder trial. His character represents the theme of justice and the importance of reasonable doubt in the legal system. In the film, McKay's character is known for his strong moral compass and willingness to challenge the opinions of others. He emphasizes the need for careful consideration of the evidence before reaching a verdict, highlighting the responsibilities of jurors in ensuring a fair trial.