Stephen King has written about killer clowns, possessed cars, and rabid dogs. But his scariest novel might be the one about a high school English teacher who just wants to stop a bullet. In 2016, the eight-part Hulu mini-series 11.22.63 —executive produced by J.J. Abrams and directed by Kevin Macdonald (with a crucial assist from James Franco)—attempted the impossible: adapting King’s 850-page opus about the JFK assassination into a tight, emotional thriller.

Because the past is obdurate. But a good story? That bends the rules. Before you watch the next time-travel show, revisit the one where a man walked into the past, fell in love, and learned that history has a body count.

The series’ greatest trick is its villain. It isn’t Oswald. It isn’t the CIA. It’s time itself. The show personifies the past as a stubborn, hostile organism. The first time Jake tries to change a minor tragedy—the murder of a janitor’s family—the universe fights back with earthquakes, broken legs, and a persistent sense of dread. "The past doesn't want to change," Jake whispers. You believe him.