Lee Hae-young

as Kwon Jung-Hyeon (12 episodes)

as Heo Il-do (16 episodes)

as Park Dae-yong (12 episodes)

as Chae Young-jo (6 episodes)

as Lee Sang-woo

as Han Min-ho (8 episodes)

as Jo Young-bae (16 episodes)

as Chief of police (1 episode)

as Lee Sang-hyuck (12 episodes)

as Hwang Yang-jung (4 episodes)

as Oh Jung-sik

as Shin Yeong-jun (11 episodes)

as Detective Squad Chief Pyo

as Lee Han-sang

as Ko Jin Bok (16 episodes)

as Oh Jong-Hwan (12 episodes)

as Hwan-gyu

as Yoo Kyung-moo (16 episodes)

as Bo-hee's Mother's Boyfriend

as Hiroshi (40 episodes)

as Kil-young's Senior Detective (16 episodes)

as Baek Woo-Jin (16 episodes)

as Cha Min-jae (12 episodes)

as Executive Director Yoon (32 episodes)

as Uigeumbu Head