About Master Key
In Master Key, players participate in a series of psychological games to find those with the master key. Viewers become the "Watchers" and determine if the players will succeed. Who will be the favourites of the crowd and have an edge over the rest? Expect to see guests like Kim Jong Min, Park Sung Kwang, Jo Bo Ah, Kang Han Na, Henry, Kang Daniel and Ong Seong Woo (Wanna One), Baekhyun (EXO), Jinyoung (B1A4), and Cha Eun Woo (ASTRO)!
Starring: Lee Soo Geun and Jeon Hyun Moo.