WHAT? DOOR! Season 1 Episode 11 WHAT? DOOR! EP.11 | Controlled Zone? A Mysterious Hospital, and Only Us Left ( Air Date 2024-06-04 ) Genre Reality category. Overview "Knock, knock! Who's there? BOYNEXTDOOR! This variety show focuses on k-pop boygroup BOYNEXTDOOR and shows off the group's fun times off stage.".