Art Director
Cinematography
Composer
Director
Editor
Screenwriter
Main Role
- Ryu Seung Ryong Main Role
- Han Hyo Joo Main Role
- Zo In Sung Main Role
- Cha Tae Hyun Main Role
- Ryu Seung Beom Main Role
- Kim Sung Kyun Main Role
- Kim Hee Won Main Role
- Moon Sung GeunMin Yong JunMain Role
- Lee Jung Ha Main Role
- Go Youn Jung Main Role
- Kim Do Hoon Main Role
Support Role
- Park Hee SoonKim Deok YunSupport Role
- Kim Shin RokYeo Un GyuSupport Role
- Shin Jae HwiBang Gi Su [Jeongwon High School student]Support Role
- Park Han SolHan Byeol [Jeongwon High School student]Support Role
- Kim Jong SooHwang Ji SungSupport Role
- Yoo Seung MokJo Rae Hyeok [Jeongwon High School Principal]Support Role
- Yang Dong GeunJung Jun Hwa [North Korean Army]Support Role
- Jo Bok RaePark Chan Il [North Korean Army]Support Role
- Kim Da HyunBae Jae Hak [North Korean Army]Support Role
- Son Byung Ho[North Korean security department chief]Support Role
- Yoon Sa Bong[Jeongwon High School custodian]Support Role
Guest Role
- Baek Hyun JinJung Sang Jin / Jincheon (Ep. 1, 12-13)Guest Role
- Jun Suk HoYun Seong Uk (Ep. 1, 6-7, 15-17)Guest Role
- Park Si WonKim Tae Hyun (Ep. 2)Guest Role
- Han Chang MinKim Bong Seok [9 years old] (Ep. 2)Guest Role
- Min Ji Ah[Kim Bong Seok's elementary school teacher] (Ep. 2)Guest Role
- Jang Yoo[Barn owner] (Ep. 2)Guest Role
- Kang Sook[School uniform store owner] (Ep. 2)Guest Role
- Choi Deok MoonJeon Yeong Seok / Bongpyeong (Ep. 2, 6, 12-13)Guest Role
- Hwang Jung Min[Butcher shop owner] (Ep. 2, 20)Guest Role
- Son Bo Seung[Butcher's son] (Ep. 2-3, 20)Guest Role
- Moon Byung Joo[Namsan Donkatsu customer] (Ep. 3)Guest Role
- Hwang Jae Hoon[Namsam Donkatsu customer] (Ep. 3)Guest Role
- Han Sang Kyung[Tattoo man's friend] (Ep. 4)Guest Role
- Bang Byung Hyun[Tattoo man's friend] (Ep. 4)Guest Role
- Yoon Jin Young[Tattoo man] (Ep. 4-6)Guest Role
- Kim Gook HeeHong Sung Hwa / Naju (Ep. 4, 12-13, 16)Guest Role
- Seo Yi RaSeo Yu Ra (Ep. 5)Guest Role
- Kang Chae Young[Seo Yu Ra's friend] (Ep. 5)Guest Role
- Park Sol Ji[Yu Ra's friend] (Ep. 5)Guest Role
- Lee Suk Hyeong[Class president] (Ep. 5)Guest Role
- Song Deok Ho[Seo Yu Ra's boyfriend] (Ep. 5)Guest Role
- Park Su AJang Hui Su (Ep. 5, 13-14)Guest Role
- Lee Ho JungYang Se Eun (Ep. 5, 16)Guest Role
- Hong Xa Bin[Hong Sung Hwa's son] (Ep. 5, 16)Guest Role
- Shim Dal GiSin Hye Won (Ep. 5-7, 20)Guest Role
- Kwak Sun YoungHwang Ji Hui (Ep. 5, 10-11, 13-15, 18, 20)Guest Role
- Kim JunJeon Gye Do [Child] (Ep. 6)Guest Role
- Lee Shi HooKwon Jin Hyun [PD] (Ep. 6)Guest Role
- Choi Yoon Bin[Assistant director] (Ep. 6)Guest Role
- Kim Kwan Jang[Audio director] (EP. 6)Guest Role
- Lee Soon Poong[Bungaeman audition judge] (Ep. 6)Guest Role
- Yoo Soo HoMario (Ep. 6)Guest Role
- Kim Tae YulFrank [Child] (Ep. 6-7)Guest Role
- Daniel C. KennedyMark (Ep. 6-7, 13, 20)Guest Role
- Lee Dong YongDong Yong (Ep. 6, 17, 20)Guest Role
- Foster Burden[Sergeant] (Ep. 7)Guest Role
- Cho Won UWon U (Ep. 8)Guest Role
- Jo Jae Wan[Pilot] (Ep. 8)Guest Role
- Jo Jin Kyul[Co-pilot] (Ep. 8)Guest Role
- Park Kyung Hye[NIS employee] (Ep. 8)Guest Role
- No Hyung Won[Double informant] (Ep. 8)Guest Role
- Lee Han Sol[Double informant] (Ep. 8)Guest Role
- Sung Yul Suk[Double informant] (Ep. 8)Guest Role
- Ryu Je Seung[Hotel staff] (Ep. 8)Guest Role
- Ryu Seung Moo[Won U's father] (Ep. 8)Guest Role
- Lee Hae Seon[Won U's mother] (Ep. 8)Guest Role
- Kwon Han SolMs. Kim [Secretary] (Ep. 8-9, 12)Guest Role
- Park Byung EunMa Sang Gu [Agent] (Ep. 8, 12, 18, 20)Guest Role
- Lee Dong ChanLee Hae Song [Mi Hyun's father] (Ep. 9)Guest Role
- Seo Suk Gyu[Shooting instructor] (Ep. 9)Guest Role
- Won Chun Gyu[Internal Affairs director] (Ep. 9)Guest Role
- Park Ok Chool[NIS North Korea Intelligence chief] (Ep. 9)Guest Role
- Lee Yoon Hee[Security guard] (Ep. 9, 20)Guest Role
- Park Sung IlJeon Jae Sung (Ep. 10)Guest Role
- Moon Jung DaeKim Gwang Jin [Pohang boss] (Ep. 10)Guest Role
- Ryu Kyung Hwan[Motorist] (Ep. 10)Guest Role
- Park Jong Bum[Nightclub waiter] (Ep. 10)Guest Role
- Kim Yoon SungBatta (Ep. 10-11)Guest Role
- Im Sung JaeBae Min Gi (Ep. 10-11)Guest Role
- Baek Joo Hee[Motel Plus's owner] (Ep. 10-11)Guest Role
- Han Yi Jin[Room 403’s gambler] (Ep. 10-11)Guest Role
- Kim Jin Uk[Gang member] (Ep. 10-11)Guest Role
- Park Joon Hwan[Praying family father] (Ep. 11)Guest Role
- Kim Deok Ju[Patient] (Ep. 11)Guest Role
- Lee Jae Seong[Gangster] (Ep. 11)Guest Role
- Kim Tae Young[Umji Coffee worker] (Ep. 11)Guest Role
- Kim Mi Ran[Umji Coffee madam] (Ep. 11)Guest Role
- Yoon Dae Yeol[Boss of Incheon’s Nolgae gang] (Ep. 11)Guest Role
- Park Jeong MinDr. Kang (Ep. 12)Guest Role
- Lee Jung MinKim Bong Seok [Child] (Ep. 12)Guest Role
- Andreas Fronk[Russian agent] (Ep. 12)Guest Role
- Ham Tae In[North Korean agent] (Ep. 12)Guest Role
- Ju A[Policy research staff] (Ep. 12)Guest Role
- Ahn Doo Ho[National Policy Research Institute team leader] (Ep. 12)Guest Role
- Ahn Hyeon Bin[Civil servant] (Ep. 13)Guest Role
- Han Dong Won[Special agent] (Ep. 13)Guest Role
- Shin Hee Chul[Emergency room doctor] (Ep. 13)Guest Role
- Im Hyung Joon[NIS search service agent] (Ep. 13)Guest Role
- Han Sa Myung[Soldier] (Ep. 13, 16)Guest Role
- Jung Young Sub[Company commander] (Ep. 13, 16)Guest Role
- Seo Mun HoMr. Park (Ep. 14)Guest Role
- Maeng Bong HakMr. Choi (Ep. 14)Guest Role
- Lee Ju Mi[Babysitter] (Ep. 14)Guest Role
- Lee Hae Young[Chief officer] (Ep. 14)Guest Role
- Jung Chung Min[NIS agent] (Ep. 14)Guest Role
- Shin Mi Young[Choi Seong U's mother] (Ep. 14)Guest Role
- Kim Shi WooLee Gang Hun [Child] (Ep. 14, 19)Guest Role
- Park Bo KyungSin Yun Yeong (Ep. 14-15, 17, 20)Guest Role
- Lee Ji Soo[Student] (Ep. 15)Guest Role
- Seol Chan Mi[Student] (Ep. 15)Guest Role
- Park Gwang JaeKwon Yeong Deuk [North Korean Army] (Ep. 15-20)Guest Role
- Min Hyeon U[Jeongwon High School past student] (Ep. 16)Guest Role
- Lee Do Heon[Jeongwon High School Past student] (Ep. 16)Guest Role
- Park Jeong Gon[Jeongwon High School Past student] (Ep. 16)Guest Role
- Moon Dong Ho[North Korean soldier] (Ep. 18)Guest Role
- Kim Joong HeeLim Jae Seok (Ep. 18-20)Guest Role
- Kim Man Gi[Control center manager] (Ep. 19)Guest Role
- Jung Han Bin[Control center staff] (Ep. 19)Guest Role
- Oh Hee JoonSong Gi Yul (Ep. 19-20)Guest Role
- Hwang Dae WoongHan Seung DoGuest Role
- Park Jung Eon[Child in cloak's mother]Guest Role
- No Myung Hwan[Rescue team]Guest Role
- Kim Ri Won[Flight attendant]Guest Role
Unknown
- Honey Chae Unknown
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