Episode 0 S00 E01

Lee Joon-gi (as Baek Hee-sung / Do Hyun-soo) Moon Chae-won (as Cha Ji-won) Jang Hee-jin (as Do Hae-soo) Seo Hyun-woo (as Kim Moo-jin) Jung Seo-yeon (as Baek Eun-ha) Nam Kee-ae (as Gong Mi-ja) Son Jong-hak (as Baek Man-woo) Jo Kyung-sook (as Moon Young-ok) Choi Dae-hoon (as Lee Woo-chul) Choi Young-jun (as Choi Jae-sup) Kim Soo-oh (as Im Ho-joon) Im Cheol-hyung (as Yoon Sang-pil) Yang Hye-jin (as Kang Pil-young) Ju Ye-eun (as Reporter Joo) Hong Seo-jun (as Chief Kang) Park Hyun Joon (as Young Do Hyun-soo) Lim Na-young (as Young Do Hae-soo) Jeong Taek-hyeon (as Young Kim Moo-jin) Choi Byung-mo (as Do Min-seok) Kim Ji-hun (as Baek Hee-sung)

detective craftsman investigation psychopath deception murder romance antisocial personality disorder hidden identity dark secret suspense thriller