Think you know everything about Bayside High's most famous students? From a secret drug addiction that wasn't caffeine pills to a cast member who was only 11 years old during filming, the beloved '90s sitcom hides some absolutely wild secrets behind its squeaky-clean Saturday morning image. Producer Peter Engel banned swearing on set, but that didn't stop the teenage cast from living it up off-camera in ways that would make Zack Morris blush. Here are the 15 weird facts you didn't know about Saved by the Bell (nineteen eighty-nine).