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 to 1885 to rescue Doc. "Back to the Future Part III" was filmed in California and Arizona, and was produced on a $40 million budget back-to-back with "Part II". "Part III" was released in the United States on May 25, 1990, six months after the previous installment. "Part III" earned $244.5 million worldwide, making it the sixth-highest-grossing film of 1990. On November 12, 1955, moments after witnessing his apparent death via lightning bolt, Marty McFly (from 1985) learns that Dr. Emmett Brown (also from 1985) was transported to 1885 and is trapped. Marty and Doc's 1955 self use the information