as Chief
as Geum Gang-sik(12 eps)
as Park Jun-su
as Yong-chul
as Jung-hwan
as Colonel Sung
as Park Bok-gi(16 eps)
as Mun-seok
as 3-3(6 eps)
as Kim Won-bin(10 eps)
as Choi Seung-il
as Lee Yeong-sik
as Kim Gwi-Hyun(20 eps)
as Cheon Min-jae(10 eps)
as Questionable Man 2
as Cheon Jong-su
as Gal-chi
as Intelligent Crime Investigation Unit Team Member
as JSS Bodyguard Leader(16 eps)