1990 film by Robert Zemeckis
Back to the Future Part III is a 1990 American science fiction Western film directed by Robert Zemeckis and starring Michael J. Fox, Christopher Lloyd, Mary Steenburgen, Thomas F. Wilson, and Lea Thompson. It is the sequel to Back to the Future Part II (1989) and the third installment of the Back to the Future trilogy.
The story continues immediately after the previous film; while stranded in 1955 during his time travel adventures, Marty McFly (Fox) discovers that his friend Dr. Emmett "Doc" Brown (Lloyd) is trapped in 1885 and was killed by Biff's great-grandfather Buford "Mad Dog" Tannen (Wilson). Marty travels to 1885 with the intent of rescuing Doc and then return to 1985, but matters are complicated when Doc falls in love with Clara Clayton (Steenburgen). It was filmed in California and Arizona, and was produced on a $40 million budget back-to-back with Part II.
Back to the Future Part III was released in the United States on May 25, 1990, six months after the previous installment, and grossed $245 million worldwide during its initial run, making it the sixth-highest-grossing film of 1990. The film received a positive response from critics, who noted it as an improvement over Part II.
Plot summary adapted from Wikipedia, licensed under CC BY-SA 4.0.