Back to the Future, Part II

Things have barely settled from the excitement and resolve of the original Back to the Future, when in pops that crazy inventor Dr. Emmett Brown (Christopher Lloyd) with news that in order to prevent a series of events that could ruin the McFly name for posterity, Marty McFly (Michael J. Fox) and his girlfriend are whisked into the future to the year 2015, where Marty must tangle with a teen rogue named Griff, who's obviously the descendant of Biff, the first Future film's bully.