Did you know that Eric Stoltz filmed for five weeks as Marty McFly in "Back to the Future" before being replaced by Michael J. Fox? Or that Kevin Spacey was completely removed from "All the Money in ...

When Back to the Future started filming, Marty McFly was played not by Michael J. Fox, but by Eric Stoltz. Who knows how different the present day might’ve been had Zemeckis not replaced his ...