Royal Secret Agent (Korean: 암행어사; RR: Amhaeng-eosa) is a South Korean historical comedy, detective television series. The series is directed by Kim Jung-min and stars Kim Myung-soo, Kwon Nara, Lee Tae-hwan, Lee Yi-kyung, and Jo Soo-min. Written by Kang Min-sun and Park Sung-hoon the series is about a government position in Joseon dynasty known as Secret royal inspector, who monitors corrupt government officials while remaining undercover. It aired on KBS2 every Monday and Tuesday at 21:30 (KST) from December 21, 2020, to February 9, 2021.