Back to the Future him to 2015 to resolve a problem with their future children. The trio board the DeLorean, which has been upgraded with hover technology, and warp to the future. Writer and producer Bob Gale conceived "Back to the Future" after he visited his parents in St. Louis, Missouri after the release of "Used Cars". Searching their basement, Gale found his father's high school yearbook and discovered he was president of his graduating class. Gale had not known the president of his own graduating class, and wondered whether he would have been friends with his father if they went to high school
Back to the Future on." Zemeckis concurred, dubbing "Back to the Future" "the film that would not wrap". He recalled that because they shot night after night, he was always "half asleep" and the "fattest, most out-of-shape and sick I ever was". The Hill Valley town square scenes were shot at Courthouse Square, located in the Universal Studios backlot (). Gale explained it would have been impossible to shoot on location "because no city is going to let a film crew remodel their town to look like it's in the 1950s." The filmmakers "decided to shoot all the 50s stuff first, and make the