Whatnerd's 15 Best Movies About Split and Multiple Personalities

"At some point, we've all been shocked by that plot twist where two characters are actually the same person. Whether it's called schizophrenia, multiple personalities, or dissociative identity disorder, it's a strong tool for inciting drama, conflict, and horror. When done poorly, split personalities can cause any otherwise mediocre or passable movie to fall apart with incredulity. But when it's done well, split personalities have the ability to bend the rules and create otherwise impossible narratives. Here are the best movies about split personalities and multiple personalities that are actually done well." - whatnerd.com