Marty secretly follows the 1955 Biff and watches him receive the almanac from his 2015 self. Marty then follows him to the high school dance, being careful to avoid interrupting the events from his previous visit. After several fruitless attempts, Marty finally gets the almanac, leaving Biff to crash into a manure truck. Marty burns the almanac, nullifying the changes to the timeline that it had caused, as Doc hovers above in the time machine. Before Marty can join him, the DeLorean is struck by lightning and disappears. A Western Union courier arrives immediately after and delivers a 70-year-old letter to Marty; it is from Doc, who explains that the lightning strike transported him back to 1885. Marty races back into town to find the 1955 Doc, who had just helped Marty to return to 1985. Shocked by Marty's sudden reappearance, Doc faints.