Composer
Director
Screenwriter
Main Role
- Jung Jae Young Main Role
- Jung Yoo Mi Main Role
- Oh Man Suk Main Role
- Noh Min Woo Main Role
Support Role
- Kang Seung Hyun Support Role
- Park Jun GyuKang Dong Sik [Chief investigator]Support Role
- Go Gyu PilJang Sung Ju [Forensic investigator]Support Role
- Ahn Suk HwanNo Han Sin [Assistant Prosecutor General]Support Role
- Park Hee JinCheon Mi Ho [Chief officer]Support Role
- Kim Young Woong Support Role
- Noh SusannaHan Su Yeon [Forensic investigator]Support Role
- Song Young KyuMa Do Nam [Director of the Forensic Investigation Division]Support Role
- Joo Jin MoPark Jung Ho [Director of hospital]Support Role
- Lee Do GukGal Dae Chul [Chief Prosecutor]Support Role
- Kim Ki MooMoon Dae Guk [Violent crimes detective]Support Role
- Min Pil JoonDetective KangSupport Role
- Jeon Gook HwanYoo Tae Jun [Chief attorney]Support Role
- Kim Dae RyeongCha Bu Jin [Social reporter from Focus]Support Role
- Choi Kyu HwanJin Sang ChulSupport Role
- Kim Ji SungSong Ji SuSupport Role
Guest Role
- Kang Yeon JungKang A Reum (Ep. 1-2)Guest Role
- Ahn Lu Ah[Student] (Ep. 1, 3)Guest Role
- Seo Wang Seok[Gangster] (Ep. 1-3)Guest Role
- Kim Tae Han[Gangster's boss] (Ep. 1-3)Guest Role
- Han Sa MyungYe Dong Jun [Drug smuggler] (Ep. 1-3)Guest Role
- Lee Sung DeukPark Ji Hun [Drug smuggler] (Ep. 1-4)Guest Role
- Park Eun SeokKang Hyun [Lawyer] (Ep. 1, 4)Guest Role
- Seo Soo Chan[Informant] (Ep. 2)Guest Role
- Seol Yu JinKim Eun Yeong (Ep. 3-4)Guest Role
- Hong Seo JoonYun Tae JunGuest Role
- Seo Eun WooCha Ju Hui [Ho Gu's wife] (Ep. 5-9)Guest Role
- Yoon Ji WonCha Do Hui [Ju Hui's sister] (Ep. 5-9)Guest Role
- Jung Tae InGil Chun Yeong (Ep. 5-7)Guest Role
- Lee Tae GeomJang Ho Cheol [Ho Gu's brother] (Ep. 5-9)Guest Role
- Kim Ji SukCheon Chun Ja [Ho Gu's mother] (Ep. 5-9)Guest Role
- Kim Jae BumLim Jong Min [Do Hui's boyfriend] (Ep. 5-9)Guest Role
- Kim Ja YoungYeom Sun Rye [Do Hui and Joo Hee's mother] (Ep. 5-9)Guest Role
- Woo Jung KookJang Ho Gu [Ju Hui's husband] (Ep. 5-6, 8-9)Guest Role
- Lee Yoon Sang[Legal mediator] (Ep. 8)Guest Role
- Ahn Ryeo Jin[Forensics staff] (Ep. 8)Guest Role
- Ok Ye RinHan Seo Hyun [Su Yeon's daughter] (Ep. 9)Guest Role
- Ha Jae Yeol[Big guy] (Ep. 9)Guest Role
- Park Jae WanMoon Ju Sung [Psychiatrist] (Ep. 11)Guest Role
- Kim Hee ChangJo Han Soo (Ep. 10-11)Guest Role
- Kim Sang Kyoon[Gas station employee] (Ep. 11-14)Guest Role
- Kim Do HyunO Man Sang (Ep. 13)Guest Role
- Kim Hye JiAn Ji Hye (Ep. 26-30)Guest Role
- Lee Yi KyungCha Su Ho (Ep. 31)Guest Role
- Jun Joon WooHong Jin OGuest Role
- Park Geon RakCha U SukGuest Role
- Lee Soo WoongKang Jun SeoGuest Role
- Yeo Woo Rin[Nurse]Guest Role
- Shin Hee Gook[Cashier]Guest Role
- Jin Ga Min[Police officer]Guest Role
- Ju Min Chan[Police officer]Guest Role
- Han Soo Ho[Bodyguard]Guest Role
- Ham Jin Sung[Gang member]Guest Role
- Jin Hyun Kwang[Ho Gu's doctor]Guest Role
- Choi Yoon Woo[Kindergarten boy]Guest Role
- Son Young Sun[Han Su's mother]Guest Role
- Jung Yoo Mi[Jang Cheol's mother]Guest Role
- Oh Dong Min[New entry prosecutor](Ep. 32)Guest Role
- Yun Seo Jeong[Community center staff]Guest Role
- Kwak Gi Hun[Big man #1 with menacing look]Guest Role
- Kang Suk Won[National Scientific, Criminal & Investigation Laboratory employee]Guest Role
- Jeong Yoon Hee[Reporter]Guest Role
- Han Sang Chul[Snake hunter]Guest Role
- Park Jun Hyuk[Detective]Guest Role
- Han Choon Il[Kindergarten car driver]Guest Role
- Yeon Je Hun[Investigator]Guest Role
- Oh Tae Eun[Hair salon customer] (Ep. 12)Guest Role
- Lee Jae Sung[Bus stop college student]Guest Role
- Shin Wu CheolPark Yeong Su [Tax officer, Ji Han's friend]Guest Role
- Lee Chae EunCha Eun Yeong [Park Yeong Su's wife]Guest Role
- Jwa Seung Hyun Guest Role
- Kim Chan Yi Guest Role
Unknown
- Kim Seung Tae Unknown
- Ryu Sung Unknown
- Shim Hye Rim Unknown
- Seo In Sung Unknown
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