Short Circuit is a 1986 American science fiction comedy film directed by John Badham and written by S. S. Wilson and Brent Maddock. The film centers on an experimental military robot that is struck by lightning and gains a human-like intelligence, prompting it to escape its facility to learn more about the world. It stars Ally Sheedy, Steve Guttenberg, Fisher Stevens, Austin Pendleton, and G. W. Bailey; Tim Blaney is the voice of the robot Number 5.

Short Circuit was theatrically released in the United States and Canada on May 9, 1986, by Tri-Star Pictures. Despite receiving mixed reviews from critics, the film was a box office success, grossing $40.7 million against a $15 million budget. It earned three nominations, including Best Science Fiction Film, at the 14th Saturn Awards. The film's sequel, titled Short Circuit 2, was directed by Kenneth Johnson and was theatrically released on July 6, 1988.