Director
Screenwriter
Main Role
- Cha Tae Hyun Main Role
- Lee Sun Bin Main Role
- Jung Sang HoonLee Ban SeokMain Role
- Yoon Gyung HoTeddy JungMain Role
- Ji Seung HyunTak WonMain Role
Support Role
- Im Chul HyungSeo In Jae [Homicide team leader]Support Role
- Jang Jin HeeYeon Jang [Red Zone Bar]Support Role
- Park Tae SanMaen Son [Red Zone Bar]Support Role
- Song Yoo HyunPD Hong [OCM Fact Check]Support Role
- Jung Chan BiLee Ga EunSupport Role
- Park Jung WooMin Dae JinSupport Role
- Kim Gyung ShikPark Joong Goo [Police chief]Support Role
- Son Kwang EopMyung Ki Chul [OCM's director]Support Role
- Sung Byung Sook[Kang Ho's mother]Support Role
- Park Sung JoonKang Moo TaekSupport Role
- Kim Young SungDetective JoSupport Role
- Seo Hye WonCho So YooSupport Role
- Cha Woo JinPark Hyun Gu [OCM Fact Check]Support Role
- Han Yeo Wool[OCM Fact check staff]Support Role
- Kwak Ji Yoo[OCM Fact check staff]Support Role
- Na Kyung Min[OCM Fact Check host]Support Role
- Kim Hong Kyung[OCM Fact Check staff]Support Role
Guest Role
- Park Chan WooJo Sang Baek (Ep. 1)Guest Role
- Ma Dong SeokJin Woo Taek [Jin Kang Ho's father] (Ep. 1)Guest Role
- Kim Kwang Gyu[Gang boss] (Ep.1)Guest Role
- Noh Su MinKoo Hyung Jin (Ep. 1-2)Guest Role
- Han Ki WonKim Min Soo (Ep. 2)Guest Role
- Han Ki WoongKim Min Seok (Ep. 2)Guest Role
- Lee Young SukJi Soo Chul [Shoe repair shop owner] (Ep. 2)Guest Role
- Son Byung WookKang Soo (Ep. 2-5)Guest Role
- Ji ChanJang Min Ki (Ep. 2-5)Guest Role
- Min Kyung OkNoh Soon Yi [Granny] (Ep. 2, 9)Guest Role
- Jang Hyun Jin[Gang boss / Past] (Ep. 3)Guest Role
- Lee Jung Do[Convenience store clerk] (Ep. 3)Guest Role
- Kwon Hyuk BumLee Tae Sung (Ep. 3, 5)Guest Role
- Seo Jin WonHan Seok Ho (Ep. 3, 5)Guest Role
- Kim Ye JinKim Jin Kyung (Ep. 3-5)Guest Role
- Jo Seung YunYoo Sung Gook (Ep. 3-5)Guest Role
- Hong Ru HyeonMrs. Kim [Jung Man's wife] (Ep. 4)Guest Role
- Kim Yong Jin[Civil servant] (Ep. 4)Guest Role
- Han Hee Jung[Clinic receptionist] (Ep. 4)Guest Role
- Lee Ha NeeJang Sung Soo (Ep. 4-5)Guest Role
- Sul Ji YoonChoi Mi Na [Doctor] (Ep. 4-5)Guest Role
- Park Jin Young[Reporter] (Ep. 5)Guest Role
- Moon Ha YeonKwak Hyun Sook (Ep. 5, 7-8)Guest Role
- Kim Tae WonMin Dae Jin [Young] (Ep. 6)Guest Role
- Noh Young HakPark Jae Min [Doctor] (Ep. 6, 8-9)Guest Role
- Uhm Tae HyunJo Jin Su (Ep. 6-7)Guest Role
- Jung Hyun JoongPark Jae Min [Young] (Ep. 6-7)Guest Role
- Kim Gun[Runaway teen] (Ep. 6)Guest Role
- Jo Han Ah Reum[Runaway teen] (Ep. 6)Guest Role
- Yoo Sung Min[Runaway teen] (Ep. 6-7)Guest Role
- Park Yoon Young[Runaway teen] (Ep. 6-7)Guest Role
- Lee Seung YeolKwon Ki Woong [Young] (Ep. 6-8)Guest Role
- Uhm Tae Ok[Kimbap vendor] (Ep. 7)Guest Role
- Kim Bum Joon[Purple coat boy] (Ep. 7)Guest Role
- Kim Jin SungJo Myung Soo (Ep. 7-8)Guest Role
- Lee Pung WoonKwon Ki Woong (Ep. 7-8)Guest Role
- Kim Hyun Tae[Oni member] (Ep. 8)Guest Role
- Park Jung Eon[Motel owner] (Ep. 8)Guest Role
- Gong Yoo Seok[Gas station owner] (Ep. 8)Guest Role
- Jang Eui Don[Family member at funeral] (Ep. 8)Guest Role
- Kim Bum SukPi Cheon Woo (Ep. 9)Guest Role
- Heo Na Kyung[Nurse] (Ep. 9)Guest Role
- Yoo Sung Yeol[Reporter] (Ep. 9)Guest Role
- Jang Myoung Un[Policeman] (Ep. 9)Guest Role
- Ok Joo Ri[Ji Young's landlord] (Ep. 9)Guest Role
- Kim Young MooShin Ki Jung (Ep. 9-10)Guest Role
- Jang Kyug SuHam Deok Su (Ep. 9-10)Guest Role
- Do Yeon JinSon Ji Young [Survivor of the serial blade killer] (Ep. 9-10)Guest Role
- Baek Seung ChulDoh Ki Tae (Ep. 9-11)Guest Role
- Cha Geon Woo[Ji Young's father] (Ep. 10)Guest Role
- Kim Young[NFS video engineer] (Ep. 10)Guest Role
- Lee Su Hyung[NFS staff] (Ep. 11)Guest Role
- Ri MinJi Soo Chul [Young] (Ep. 12)Guest Role
- Jang Ha Eun[Victim]Guest Role
- Han Sang Jo[Detective]Guest Role
- Yoo Young Chae[Detective]Guest Role
- Ha Young Jin[Policeman]Guest Role
- Lee Jang Ho[Prison guard]Guest Role
- Yang Ha Yoon[Anchorwoman]Guest Role
- Lim Yoon Bi[Cancer patient]Guest Role
- Lee So Yeong[Fact Check staff]Guest Role
- Jung Hwan Guest Role
Unknown
- Ae Joo Unknown
- Lee Jung Hoon Unknown
- Jo Seung Gu Unknown
- Jo Yeong Jae Unknown
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