Back to the Future (franchise) of sporting events to make easy money. However, Doc talks him out of it and throws the almanac in the bin, where the 2015 Biff Tannen finds it. A sleeping Jennifer has been taken by police to her future home, needing Marty and Doc to retrieve her before returning to 1985. While Marty and Doc are at the 2015 McFly home, 2015 Biff steals the DeLorean time machine and gives the book to his 1955 self just before he goes to the dance at the end of the first film. When Doc and Marty return to 1985, they find that
Back to the Future (franchise) not doing so will unravel everything they've accomplished. In a female voice, the artificial intelligence of the Quantum Mind Jar tells Doc that they need to go back to the future, which he dismisses as he doesn't want to risk making any more time travel. At that moment, another Emmett Brown, from an unknown time period, arrives, also declaring his experiment a success. Both versions of Emmett, along with the artificial intelligence of the Quantum Mind Jar, are shocked at discovering that there are two Emmett Browns present. "Back to the Future: The Ride" is a simulator ride based on