In Back to the future (part 1), it's the mid-80's, and Marty McFly is your average 17-year-old slacker who happens to be friends with an inventor, Doc Brown. Doc's latest invention is a time machine, that ends up transporting Mary back to 1955 where he must bring get his parents together so that he will exist when he gets back to his own time. In Back to the future II, Marty visits 2015 to straighten out the future of the McFly family, but Biff Tannen...