"Son of a Gun" is the third episode of the first season of the American police drama television series Homicide: Life on the Street. It originally aired on NBC in the United States on February 10, 1993. The teleplay was written by James Yoshimura based on a story by executive producer Tom Fontana, and the episode was directed by Nick Gomez. In the episode, recurring character Officer Thormann (Lee Tergesen) is shot while on duty, and his close friend Crosetti takes the investigation personally.