Director
Main Role
- Lee Sung MinKim Taek RokMain Role
- Jin GooKook Jin HanMain Role
- Kyung Soo JinLee Sung AMain Role
- Lee Hak JooSon Kyung ChanMain Role
Support Role
- Kim Hong PaSeo Gwang SuSupport Role
- Yoo Seung MokBae Young Doo [Detective squad chief]Support Role
- Oh Dae HwanMa Sang GuSupport Role
- Kim Min JaeDetective HanSupport Role
- Seo Jung YeonOh Hye SungSupport Role
- Go Gyu PilGong Chong Moo [Dormitory manager]Support Role
- Park Joong GeunKwak Sang Kyu [Detective]Support Role
- Hong A RonDetective KoSupport Role
- Kim Soo JinShin Jung AeSupport Role
- Jung Yi JuKim Ji WooSupport Role
- Jang Jae Kwon[Shin Jung Ae's brother] (Ep. 2)Support Role
- Song Young ChangAn Hyung WooSupport Role
- Kwon Tae WonCouncilman ParkSupport Role
- Kang Shin GooCEO JooSupport Role
- Jang Myung GapShin Sung Han [CEO]Support Role
- Hyun Bong SikGu Dong BumSupport Role
- Yoon Je MoonCheon Ki Duk [Drug gang]Support Role
- Kim So Yang[Detective]Support Role
Guest Role
- Kwon Hyuk Bum"Antenna" (Ep. 1)Guest Role
- Choi Soo MinYeon Sim (Ep. 1, 8)Guest Role
- Kim Bum JoonJi Min [Cashier] (Ep. 1)Guest Role
- Kim Tae HoonWoo Hyun Seok [Prosecutor] (Ep. 1-2)Guest Role
- Lee Dong Kyu[Anchorman] (Ep. 1)Guest Role
- Hwang Jung Yoon[Saleswoman] (Ep. 1)Guest Role
- Na Ho Won[Security guard] (Ep. 1)Guest Role
- Lee Moo Nyoung[Noeul Dormitory resident] (Ep. 1)Guest Role
- Kim Byung ChulChoi Kyo Il (Ep. 2)Guest Role
- Kim Jong YoonLee Jae Ho (Ep. 2)Guest Role
- Yoo Eun AHan Se Young (Ep. 2-3)Guest Role
- Goo Shi YeonMyung Hee [Han Se Young's mother] (Ep. 2-3)Guest Role
- Lee Si Young[Nurse] (Ep. 2)Guest Role
- Son Suk Bae[Taxi driver] (Ep. 2-3)Guest Role
- Gu Bon Jin[Prison guard] (Ep. 2)Guest Role
- Son Seung Taek[Wedding hall staff] (Ep. 2)Guest Role
- Kwon Oh JinSin Sang Bong (Ep. 3)Guest Role
- Jung Ki Sun[Homeless man] (Ep. 3)Guest Role
- Jang Sung BumAn Ju Yong (Ep. 4)Guest Role
- Jeong Hee TaeLee Jun Bum (Ep. 4)Guest Role
- Eom Ji Man[Detective] (Ep. 4)Guest Role
- Geum Kwang SanChoong Bok (Ep. 5-6)Guest Role
- Baek Seung ChulPark Chun Kyu (Ep. 5)Guest Role
- Oh Chae Eun[Barista] (Ep. 5)Guest Role
- Min Sang Chul[Cafe manager] (Ep. 5)Guest Role
- Han Sang Chul[Boat gang member] (Ep. 6)Guest Role
- Yoo Jae Sang[Woo Hyun Seok's son] (Ep. 5)Guest Role
- Yoon Hyun Gil[Woo Hyun Seok's wife] (Ep. 5)Guest Role
- Mi Seok[Ma Sang Gu's subordinate] (Ep. 5-6)Guest Role
- Ahn Nae SangChairman Jang (Ep. 7-8)Guest Role
- Kim Min ChulKook Jin Han [Young] (Ep. 7)Guest Role
- Kim Jung SooKim Sung Hwan [Chairman] (Ep. 7)Guest Role
- Lee Kyung OhHan Ju Hwan [Police Commissioner] (Ep. 7)Guest Role
- Ma Jung Pil[Informant] (Ep. 7)Guest Role
- Seol Yu Jin[Kook Jin Han's wife] (Ep. 7)Guest Role
- Lee Yoon HeeLee Young Bae [Police chief] (Ep. 8)Guest Role
- Son Ki Chul[Reporter] (Ep. 8)Guest Role
- Kim Hyun Tae[Detective] (Ep. 8)Guest Role
- Kim Jae BumYang Ki TaeGuest Role
- Kwon Ye EunKim Ji Woo [Young]Guest Role
- Choi Woo Gyeom[Police officer] (Ep. 7)Guest Role
- Jo Yong Hwan[Yanbian group #3] (Ep. 6-7)Guest Role
- Jang Ho JinDetective JiGuest Role
- Park No Kyeong[Money scammer] (Ep. 1)Guest Role
Unknown
- Lee Bo Ram Unknown
- Yoo Da Hye Unknown
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