In the storyboards, the military is preparing for a bomb test in the desert.

“And the most expensive thing was going on location and building this town.

It wasn’t just Marty McFly who underwent casting changes.

Lightning strikes the DeLorean at the end of ‘Back to the Future’

Image via Universal Pictures

Michael J. Fox as Marty McFly wearing sunglasses in Back to the Future

Image via Universal Pictures

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Marshall Strickland dies in his son’s arms in the woods in a deleted scene from ‘Back to the Future Part III’

Image via Universal Pictures

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Marty McFly, a 17-year-old high school student, is accidentally sent 30 years into the past in a time-traveling DeLorean invented by his close friend, the maverick scientist Doc Brown.

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