Back to the Future Part III is a 1990 American science fiction comedy Western film. It is the third and final installment of the Back to the Future trilogy. The film was directed by Robert Zemeckis and starred Michael J. Fox, Christopher Lloyd, Mary Steenburgen, Thomas F. Wilson and Lea Thompson. The film takes place immediately after the events of Back to the Future Part II. Marty McFly must rescue Doc Brown, who is stranded in 1885, from being killed by Buford Tannen.
Filming took place in both California and Arizona, and the film was released in the United States on May 25, 1990. The film was a commercial success and achieved $244.53 million at the international box office, making it the 6th highest grossing film of 1990. Fan reaction to the film was more positive than to the first sequel, with many stating that this entry to the series reflected the original better than Part II. Critics also gave Part III better reviews than Part II, which had been met with mostly mixed to positive reactions.