When Marty McFly (international treasure Michael J. Fox) strands himself and a time-traveling DeLorean DMC-12 in the year 1955, he partners with the younger version of his future friend, the brilliant, eccentric inventor Doc Brown (Christopher Lloyd), to send him back to 1985. But when Marty inadvertently causes his then-teenage mother (Lea Thompson) to fall in love with him instead of his father (Crispin Glover), he must scheme to bring them back together — and defeat school bully Biff Tannen (Thomas F. Wilson) — all while racing time to catch the bolt of lightning that will generate the 1.21 gigawatts