The iconic Back to the Future franchise recast Marty McFly's girlfriend, Jennifer Parker, numerous times because of changing circumstances.

Back to the Future's animated series wasn't bad, but it did show why a proper live-action sequel to the original trilogy would never have worked.

In an era where nearly every beloved franchise gets a sequel, reboot, or "legacyquel," there’s one that remains untouched despite constant requests: Back to the Future . No matter how many times filmm ...