Back to The Future Part 2 1989

Where Do They Start? 1985, of course.Where Do They End Up? 2015, then an alternative 1985, and finally 1955. Keep up. Biggest Culture Clash. A literal clash, as Biff Tannen (Thomas F. Wilson) recasts Hill Valley in his own image.Unresolved Paradox. When Marty and Jennifer travel to 2015, surely they cease to exist in the interim years. So how are they able to have kids?