Imagine working on a top-secret movie for years, only for the entire plot to hit the internet before the trailer even drops. Brutal, right? Movie scripts that were leaked or stolen have led to chaos behind the scenes. Some films barely survive the aftermath. Whether it’s from shady hackers, careless actors leaving scripts lying around, or straight-up betrayals from insiders, these leaks shake up the industry, and not always in a good way.

Some films barely survive the chaos. The Hateful Eight almost got scrapped entirely. Others have to do last-minute rewrites. Terminator Salvation had to ditch its controversial ending. Then there’s Deadpool, where leaked test footage actually saved the movie and convinced the studio to greenlight it. Talk about a plot twist.

With the internet moving at lightning speed, keeping a movie’s secrets under wraps is harder than ever. One leaked script can spark hype, ruin surprises,...