Composer
Director
Screenwriter
Main Role
- Yoon Shi Yoon Main Role
- Jung In Sun Main Role
- Park Sung HoonSeo In WooMain Role
Support Role
- Lee Han WiYook Jong Chul [Dong Shik's father / Restaurant Owner]Support Role
- Hwang Geum ByulYook Ji Yun [Dong Shik's big sister]Support Role
- Kim KyulJo Yong Gu [Dong Shik's brother-in-law]Support Role
- Jung Su BinYook Dong Chan [Dong Shik's half-brother / 11th grader]Support Role
- So Hee JungNa In Hye [Dong Shik's stepmother]Support Role
- Choi Sung WonHeo Taek Soo [Constable / Bo Kyung's companion]Support Role
- Kim Myung SooShim Suk Gu [Bo Kyung's father / Former Ace Detective]Support Role
- Lee Kan HeeLee Suk Yun [Bo Kyung's mother / Cafe Owner]Support Role
- Lee Hae YoungRyu Jae Joon [Criminal Profiler / Bo Kyung's uncle]Support Role
- Park Jung HakSeo Chung Hyun [In Woo's father / Chairman of Daehan Securities]Support Role
- Yu BeeSeo Ji Hun [In Woo's step-brother / Managing Director of Daehan Securities]Support Role
- Yoon Ye HeeKim Eun Shil [Chung Hyun's wife / Ji Hun's mother]Support Role
- Kim Hye NaSeo Ji Yun [In Woo's step-sister]Support Role
- Hwang Sun HeeJo Yu Jin [Audit Team Leader]Support Role
- Choi Dae ChulGong Chan Suk [Dong Shik's boss / Asset Management Team Leader]Support Role
- Kim Ki DooPark Jae Ho [Dong Shik's colleague / Asset Management Team Deputy]Support Role
- Jo Shi NaeHan Jung Ah [Dong Shik's colleague]Support Role
- Choi Tae HwanShin Suk Hyun [Dong Shik's colleague]Support Role
- Lee Min JiOh Mi Joo [Dong Shik's colleague]Support Role
- Heo Sung TaeJang Chil Sung [Retired Gangster]Support Role
- Han Soo HyunKim Mu Suk [In Woo's aide | former detective]Support Role
Guest Role
- Jung Hae KyunKim Myung Guk [Homeless man] (Ep.1-2, 4)Guest Role
- Yura[Woman walking dog] (Ep. 2)Guest Role
- Han Ji Eun[Passerby's girlfriend] (Ep.2)Guest Role
- Nam Jung Hee[Murder victim] (Ep.2, 4)Guest Role
- Yun Ji OnJoo Young Min [Firm Executive] (Ep.4-5)Guest Role
- Lim Il GyuKim Chan Il [In Woo's brother-in-law]Guest Role
- Sung Chan Ho[Caretaker of Memorial Park] (Ep.9)Guest Role
- Lee Dong Yong[Prisoner] (Ep.12-13)Guest Role
- Mi Seok[Prisoner] (Ep.12-13)Guest Role
- Ok Joo Ri[Neighbor of driver in crash] (Ep.13)Guest Role
- Han Yi Jin[Reporter] (Ep.16)Guest Role
- Kim Mo BumNergui [Mongolian factory worker]Guest Role
- Shin Soo Hang[Doctor's friend]Guest Role
- Lee Dong Kyu[News Anchor]Guest Role
- Oh Chae Eun[Seo Ji Hun's Secretary]Guest Role
- Jin Shi Won[Reporter] (Ep. 1, 12)Guest Role
- Lee Jang Ho[Nurse] (Ep 8)Guest Role
- Moon Chang Jun[Park Jae Ho's co-worker] (Ep.16)Guest Role
- Jeon Soo Yeon[Nurse] (Ep. 8-9)Guest Role
- Lee Do Hye[Escape room player](Ep. 16)Guest Role
- Yoo Sung Yeol[Escape room player] (Ep. 16)Guest Role
- Jin Yu ChanYook Dong Chan [Child]Guest Role
- Kim Jang Hwan[Anchor]Guest Role
- Shin Soo Oh[Doctor's friend]Guest Role
- Jung Chul Soon[Dong Shik's colleague in bathroom]Guest Role
- Jo Suk Hyun Guest Role
- Song Hoon[asset management team leader of Daehan Stock]Guest Role
- Park Ki Ryung Guest Role
- Yang Hee JaeSeo Ji Hun [Child]Guest Role
- Ha Jin[ER Nurse]Guest Role
- Koo Ja Keon[Bully]Guest Role
- Yong Jin Guest Role
- Lee Hyun Woong Guest Role
- Jang Eui Don[Bus driver]Guest Role
- Kim Ah Ram[Nurse] (Ep. 16)Guest Role
- Jo Yoon Ho[Gang boss]Guest Role
- Kim Nam Ho[Accommodation staff]Guest Role
- Lee Su MinHong Jin GuGuest Role
- Yoon Gyung Ho Guest Role
Bit part
- Seo Jin WonMin Suk (Ep. 4)Bit part
- Kim Joon KyungBartender (Ep. 10)Bit part
Unknown
- Kim Sung Gon Unknown
- Im Ho Joon Unknown
- Kwon Chan Min Unknown
- Jo Eun Yoo Unknown
- Yoon Sung Won Unknown
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