Alternate story

While Back to the Future: Part II takes Marty to, well, the future, that wasn’t always the plan.

Robert Zemeckis revealed that initially, the movie would have seen Marty travel back in time to 1967, where he would have met his mother Lorraine as “a flower child, and she’s protesting the war in Vietnam”.

Marty would then have been thrown in jail because he didn’t have a draft card.

However, Zemeckis ultimately scrapped this idea, as he thought the film would work better if he could take Marty back to the events of the first Back to the Future movie.

Eventually, Zemeckis put together the story for Back to the Future: Part II that made its way to the silver screen - which sees an old Biff Tannen (Thomas F. Wilson) find a stolen sports almanac in 2015, and travel back in time to give to his younger self to become rich and powerful.

It’s then up to Marty to travel back to 1955 and retrieve the almanac before he’s stuck in Biff’s new, dystopian reality.