Back to the Future Part II (1989)

In the alternate 1985 created by Biff Tannen using a stolen sports almanac, George McFly was shot and killed by Biff on March 15, 1973 — leaving Lorraine trapped in a forced marriage and Hill Valley under Biff's corrupt rule. This is the dark timeline Marty and Doc must unravel: the film's vision of what a single selfish act can do to an entire community.

October 21, 2015 is the future date Doc and Marty travel to in Back to the Future Part II — a vision that gave pop culture hoverboards, self-lacing sneakers, and flying cars. When the real October 21, 2015 arrived, it was celebrated worldwide as 'Back to the Future Day,' fans noting what the film got right (flat screens, video calls, the Cubs in the World Series) and what it cheerfully missed.