Guess the movie

The year is 1985 and Marty McFly is your everyday teenager, except for one problem. He is stuck in ****. After his good friend Doc Emmett Brown is gunned down, Marty ends up sending the DeLorean back thirty years into the past. Now, he must find the Doc and convince him that he is from the *******, in order for the Doc to send him back to the ******, but this is the least of Marty's problem. After accidentally getting in the way of the important meeting between his future mother and father, Marty must get them back together before he changes time forever, and destroys his own existence. Written by simon