A proper plot twist is a punch to the gut. One minute, you're happily watching your favorite TV show, and the next, your jaw is on the floor because a trusted ally turned out to be a villain, a beloved character died, or the entire story suddenly took on a different meaning. That's the stuff of legend. Some twists mess with time. Some recontextualize everything that came before. Others send a series in a bold new direction or force viewers to see characters from a completely new perspective.