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.