Oh, the Mysterious (Korean: 의문의 일승; RR: Uimunui Ilseung; lit. Doubtful Victory) is a South Korean television series starring Yoon Kyun-sang and Jung Hye-sung. It aired on SBS from November 27, 2017 to January 30, 2018 on Mondays and Tuesdays at 22:00 (KST) time slot for 40 episodes.