1 Marty McFly and Doc Brown launch themselves to the year 2015 to fine-tune the future and inadvertently disrupt the space and time continuum. Marty foils Griff and his group when he jumps on an air-foil skateboard that flies him through town at rakish speeds with the loser bullies beaten again. He figures that back in 1985 he';;;ll be able to place sure-fire bets using the published sports scores of the games that are yet to happen.