By now, everybody knows the Cubs were predicted to win the 2015 World Series in the movie Back to the Future II, which was released in 1989.
But how did that prediction come about?
Bob Gale, a co-writer for all three Back to the Future movies, joined Cubs Pregame Live with CSN's David Kaplan before Game 3 of the NLCS to discuss how it went down.
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"The whole idea of the story of Part II is that Marty McFly goes into the future and gets the idea to use time travel to get rich," Gale said. "And as a kid, what would he think of? He's 17 years old, he wouldn't think about investing in the stock market. No, he'd be a sports fan and he'd think about sports.
"So to give him that incentive, we thought 'OK, let's give him the most outrageous sports thought ever possible that the Cubs win the World Series.' This would be a completely insane idea to a kid in 1985, so that's how it started."
Gale is also a diehard Cardinals fan, and was in a bit of a predicament for the NLDS: Did he root for his prediction to come true or his team to advance?
Check out his answer and the full interview above.
*Back to the Future 30th anniversary trilogy is available on Blu-ray and DVD, and the films are playing at select theaters nationwide.