Director
Producer
Screenwriter
Main Role
- Yoo Ji Tae"J"Main Role
- Lee Bum SooCha Gi TaeMain Role
- Lee Min JungHan Su HyeonMain Role
- Kwak Do WonJang Jung HyeokMain Role
Support Role
- Kim Jae Yong"Fixer" [J's problem solver]Support Role
- Jung Young JooKang Sun / "Kkangsuni" [J's right-hand man]Support Role
- Ryu Ji WonYang Yeon [Daughter of Su Hyeon's master]Support Role
- Kim Dong GyunMa Jeong Cheol [NIS 3rd deputy director]Support Role
- Go YoonHan Yong San [NIS financial crimes team leader]Support Role
- Tae Won SeokTak Jung Gi [Jung Hyeok's right-hand man]Support Role
- Lee Shi ADr. Choi [Drug cartel manufacturer]Support Role
- Jung Yoon Jae[Do Sik's subordinate]Support Role
Guest Role
- Jung In KiYang Cheol Jin / Yang Do Sa [Su Hyeon's master] (Ep. 1)Guest Role
- Bong Eun Sun[Motel clerk] (Ep. 1)Guest Role
- Ha Kyung Min[Detective] (Ep. 1)Guest Role
- Lee Seo HwanChoi Do Sik [Drug cartel boss] (Ep. 1-2)Guest Role
- Jung Hee Young[Currency dealer] (Ep. 1, 3)Guest Role
- Kang Dong YupPark Yun Gyu (Ep. 2, 6)Guest Role
- Song Yo SepCaptain Jung (Ep. 2)Guest Role
- Park Sang Hyuk[NIS currency unit chief] (Ep. 2)Guest Role
- Bae Seong Il[Detective] (Ep. 2)Guest Role
- Kim Si Kook[Crime scene investigator] (Ep. 2)Guest Role
- Lee Se Mi[Drug dealer] (Ep. 2)Guest Role
- Kim Jae Il[Wine bar owner] (Ep. 2)Guest Role
- Im Yu Ran[Woman in club] (Ep. 2)Guest Role
- Ko Na Young[Drug user] (Ep. 2-3)Guest Role
- Seol Chang Hee[Detective] (Ep. 3)Guest Role
- Choi Jung WooBang Geuk Hyeon [Myeongseong thrift institution chairman] (Ep. 4)Guest Role
- Park YongAssemblyman Kang (Ep. 4)Guest Role
- Lee Yoon SangAssemblyman Choi (Ep. 4)Guest Role
- Park Ha Jun"J" [Teen] (Ep. 5)Guest Role
- Kim Seo HeonHan Su Hyeon [Child] (Ep. 5)Guest Role
- Hwang Sung Ung[NIS agent] (Ep. 5)Guest Role
- Moon Jung DaeHan Dong U (Ep. 5)Guest Role
- Shin Hee Gook[CCTV center staff] (Ep. 6)Guest Role
- Ahn Jong Jin[CCTV center staff] (Ep. 6)Guest Role
- Jang Myoung Un[Bank security staff] (Ep. 6)Guest Role
- Choi Hyun Joon[Bank security manager] (Ep. 6)Guest Role
- Kyung Ki Hyun[Bank security staff] (Ep. 6)Guest Role
- Park Yoo Hyun[Anchorwoman] (Ep. 7-8)Guest Role
- Lee Jang Ho[Customs officer] (Ep. 8)Guest Role
- Jung Hyun Woo[Customs officer] (Ep. 8)Guest Role
- Cha Sang Mi[Neighbor onlooker, past] (Ep. 8)Guest Role
- Jo Young Mi[Neighbor onlooker, past] (Ep. 8)Guest Role
- Min Jung Sup[Detention center guard] (Ep. 8)Guest Role
- Moon Yong Il[Detention center guard] (Ep. 8)Guest Role
- Kim Jong TaePark Dae Sik [Chief prosecutor, Seoul district]Guest Role
- Choi Kang SooYeom Chul Ju [Head of violent crimes team, Incheon]Guest Role
- Lee Ho Kyung[NIS agent]Guest Role
- Kwon Ki Ha[Transport crew]Guest Role
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