Director
Screenwriter
Main Role
- Kim Ok BinLee Hwa SunMain Role
- Lee Joon HyukYoo Tae HanMain Role
Support Role
- Park Keun RokChoi Seung TaeSupport Role
- Oh Yu JinHan Dong Rim [Student]Support Role
- Song Sang EunKim Seon Nyeo / "Sunnyeo" / "Madame Kim"Support Role
- Lee Ye BitJung Do YoonSupport Role
- Bae Jung HwaHan Ji Soo [Doctor]Support Role
- Im Won HeePark Soon Il [Policeman]Support Role
- Cho Ji AnCho Hyun Ho [Policeman]Support Role
- Kim Su OlYoon Ji Ae [Hyun Ho's wife]Support Role
- Yong Jin"Snake Eyes" [Loan shark]Support Role
- Kim Do HoonLee Jin Seok [Student]Support Role
- Lee Ha EunYoon Saet Byul [Nurse]Support Role
- Kim Byung GiChoi Kyung Soo [Seung Tae's father / Muji High School's president]Support Role
- Heo Hyung KyuKang Sung Beom [Hwa Sun's husband]Support Role
- Jang Myung GapSon Dong Goo [Teacher]Support Role
- Jang Sung WonLee Young Tae [Hospital Security Officer]Support Role
- Park Gye YoonTae Ho [Student]Support Role
- Ga Soo MinHan YeulSupport Role
Guest Role
- Kim Han JongNam Young Shik [Tae Han's friend] (Ep. 1-2)Guest Role
- Ahn Eun JinSo Jung Hwa [Detective] (Ep. 1-2)Guest Role
- Min Joon HyunDetective Cha [Metropolitan Investigation Unit] (Ep. 1)Guest Role
- Won Chun GyuNam Jin Il [Infected man] (Ep. 1-2)Guest Role
- Yoon SeulKim Bo Eun [Jung Do Yoon's mother / Nurse] (Ep. 1-2)Guest Role
- Oh Jin Seok[Shaman rite dummer] (Ep. 1)Guest Role
- Yang Jin Seon[Shaman rite attendee] (Ep. 1)Guest Role
- Jung Eui Soon[Shaman rite attendee] (Ep. 1)Guest Role
- Kim Deok Ju[Shaman house woman] (Ep. 1)Guest Role
- Lee Sang Hee[Jin Il's wife] (Ep. 1-2)Guest Role
- Seo Young SamSeo Yong Min [school janitor] (Ep. 2-6)Guest Role
- Jung Hae KyunLim Joo Ho (Ep. 2-3)Guest Role
- Yoon Jung HoonWoo Sang [Student / Jin Seok's friend] (Ep. 2)Guest Role
- Ho Sol Hee[Female student / Bully] (Ep. 2, 8)Guest Role
- Jung Soo Bin[Female student / Bully] (Ep. 2, 8)Guest Role
- Jung Se Hyun[Female student / Bully] (Ep. 2, 8)Guest Role
- Uhm Tae Ok[Line worker] (Ep. 2)Guest Role
- Ki Hwan[Pathologist] (Ep. 2)Guest Role
- Shin Jun Chul[Pathologist] (Ep. 2)Guest Role
- Tak Jae HoonMr. Bae [infected man] (Ep. 2)Guest Role
- Park Xi Yeon[High school student] (Ep. 3-4, 6)Guest Role
- Jeon Yeo JinKim Ji Min [Lim Joo Ho's disciple] (Ep. 3)Guest Role
- Im Ho JoonNam Dong Geun [Hospital survivor] (Ep. 4-10)Guest Role
- Kim Won SeokMr. Kim [Hospital survivor] (Ep. 4-10)Guest Role
- Lee Hyun KyunNoh Jin Soo [wanted man] (Ep. 3-7)Guest Role
- You Chae Eun[Nurse] (Ep. 3-5)Guest Role
- Lee So Geum[Patient] (Ep. 4-5)Guest Role
- Lee Chul MinKang Duk Soo (Ep. 4, 6)Guest Role
- Choi Min Geum[Chang Hee's grandmother] (Ep. 4, 6)Guest Role
- Yoo Sang Hoon[Agent] (Ep. 5-6)Guest Role
- Park Ji AnJang Myung Cheol [school survivor]Guest Role
- Kim Kang MinMin Gyu (Ep. 11-12)Guest Role
- Kim Yoon JiAn Ji SookGuest Role
- Jeon Young Mi[Bong Ju's mother]Guest Role
- Lee Moo Nyoung[Hospital survivor]Guest Role
- Kim Mi Ra[Middle-aged woman #2]Guest Role
- Kang Seo Ha[Disorderly student #3]Guest Role
- Yoon Jong Won[Hospital survivor]Guest Role
- Chu Eun Kyung[Bong Sik's wife]Guest Role
- Lee Ho WonHyun Bong ShikGuest Role
- Roh Eun Jung[Hospital survivor]Guest Role
- Han Yu Hee[Locked out patient] (Ep. 5)Guest Role
- Park Ye ChanChang HeeGuest Role
- Gu Yun Hoi[Doctor] (Ep. 4)Guest Role
- Bae An Na[Nurse] (Ep. 4)Guest Role
- Choi Hwa Young[Employee] (Ep. 12)Guest Role
- So Yun Ho[Jingan Supermart survivor] (Ep. 9)Guest Role
- Lee Dong Wook[Hospital survivor]Guest Role
- Choi Joon KyuYoo Kang Soo (Ep. 4, 10)Guest Role
- Kim Won Joong[Hyun Mi's father] (Ep. 3)Guest Role
- Jang Soon Mi[Hospital survivor]Guest Role
- Sung Hyun Mi[Hyun Ji's mother] (Ep. 8)Guest Role
- Jang Yong Bok[Doctor] (Ep. 9)Guest Role
- Han Dong Won[Snake Eyes' co-worker] (Ep. 10)Guest Role
- Ok Joo Ri[Convenience store owner] (Ep. 12)Guest Role
- Kim Kwang Suk[Detective] (Ep. 1, 8)Guest Role
- Park Yoo Hyun Guest Role
- Na Se Na[Teacher]Guest Role
Bit part
- Lee Jae Sung[Hospital survivor]Bit part
Unknown
- Lee Chae Hyun Unknown
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