In the first movie, after going back to 1955, teaching his dad to stand up for himself, and setting up his parents to date, Marty McFly returns to his own time, 1985, to find his whole life is forever changed. His father became confident and successful, his mother Lorainne (Lea Thompson) once again found happiness in her marriage, and Biff Tannen (Thomas F. Wilson) became a lowly valet, marking a happy ending for the McFly family. Crispin Glover, however, felt that the conclusion didn't suit the movie as a whole.
The ending of the first Back to the Future was a big point of contention between Glover and Zemeckis, as the actor explained on The Opie and Anthony Show back in 2013. "I thought it was not a good idea for our characters to have a monetary reward, because it basically makes the moral of the movie that money equals happiness," Glover said, going on to insist that, "Love should be the reward." This pushback, combined with constant questioning of the morality of the story, frustrated Zemeckis and dampened his relationship with Glover.
