Back to the Future is a 1985 American science-fiction adventure comedy film directed by Robert Zemeckis and written by Zemeckis and Bob Gale. It stars Michael J. Fox as teenager Marty McFly, who is sent back in time to 1955, where he meets his future parents in high school and accidentally becomes his mother's romantic interest. Christopher Lloyd portrays the eccentric scientist Dr. Emmett (Doc) Brown, Marty's friend who helps him repair the damage to history by helping Marty cause his parents to fall in love. Marty and Doc must also find a way to return Marty to 1985.