After the midsection in which George is a tombstone ... Biff might have restored the status quo to what it was before Marty McFly changed history, forcing George McFly to become his subordinate ...

Marty McFly is a rock ‘n’ roll teenager who is accidentally transported back to 1955 in a time-traveling DeLorean invented by his friend, Dr. Emmett Brown. But before he can return to 1985 ...