Secret Door Guest cast, played by Choi Jae Hwan Episode 1x01: Episode 1 (Sep 22, 2014) Episode 1x02: Episode 2 (Sep 23, 2014) Episode 1x03: Episode 3 (Sep 29, 2014) Episode 1x04: Episode 4 (Sep 30, 2014) Episode 1x06: Episode 6 (Oct 7, 2014)