Teenager Marty McFly's dad is a hideous wimp, his mother a dipso, so he befriends mad scientist Dr. Brown (Lloyd). In a DeLorean time machine they travel back to 1955, the year his parents met in high school. But at that age, mom rather fancies her offspring more than his prospective father. Zemeckis takes obvious pleasure in solving not just the technical but also the emotional problems of time travel: how to avoid incest, how to unite your parents in order that you will be born, how to return to the future when both the car and the professor have blown a fuse, and above all how to avoid tampering with history.
Cast: Michael J. Fox, Christopher Lloyd, Lea Thompson