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 Part III capacitor appears, manned by Doc, Clara, and their two children Jules and Verne. Doc gives Marty a photo of the two of them by the clockworks in 1885. Jennifer asks about the fax, and Doc tells them it means that the future has not yet been written. Doc departs and the train disappears into an unknown time. The origins of the western theme for "Back to the Future Part III" lie in the production of the original film. During filming for the original, director Zemeckis asked Michael J. Fox what time period he would like to see. Fox replied that