Behind the laughs of That ’70s Show, its cast faced heartbreaking struggles—from Laura Prepon losing her father to a medical error, to Mila Kunis’s family fleeing Ukraine with just $250, to Ashton Kutcher’s chilling connection to a murder case. Add to that Lisa Robin Kelly’s devastating battle with addiction and Tanya Roberts’ sudden passing, and the beloved sitcom’s legacy is shadowed by real-life pain—let’s watch the video to uncover the tragedies you never saw coming...