Lee Soon-won

as Chief

as Geum Gang-sik (12 episodes)

as Park Jun-su

as Yong-chul

as Jung-hwan

as Colonel Sung

as Park Bok-gi (16 episodes)

as Mun-seok

as 3-3 (6 episodes)

as Kim Won-bin (10 episodes)

as Choi Seung-il

as Lee Yeong-sik

as Kim Gwi-Hyun (20 episodes)

as Cheon Min-jae (10 episodes)

as Questionable Man 2

as Cheon Jong-su

as Gal-chi

as Intelligent Crime Investigation Unit Team Member

as JSS Bodyguard Leader (16 episodes)