Back to the Future is a 1985 American science fiction film directed by Robert Zemeckis and written by Zemeckis and Bob Gale. It stars Michael J. Fox as teenager Marty McFly, who accidentally travels back in time from 1985 to 1955, where he meets his future parents and becomes his mother's romantic interest. Christopher Lloyd portrays the eccentric scientist Dr. Emmett "Doc" Brown, inventor of the time-traveling DeLorean, who helps Marty repair history and return to 1985. The cast also includes Lea Thompson as Marty's mother Lorraine, Crispin Glover as his father George, and Thomas F. Wilson as Biff Tannen, Marty and George's arch-nemesis.
Back to the Future was released on July 3, 1985, and it grossed over $381 million worldwide, becoming the highest-grossing film of that year. The film began a franchise including two sequels, Back to the Future Part II (1989) and Back to the Future Part III (1990), an animated series, a theme park ride, several video games, a number of comic books, and an upcoming stage musical.