Composer
Director
Screenwriter
Main Role
- Namkoong MinHan Ji HyukMain Role
- Park Ha SunSeo Soo YeonMain Role
- Kim Ji EunYoo Je YiMain Role
Support Role
- Jang Young NamDo Jin Suk [NIS overseas division deputy director]Support Role
- Kim Jong TaeKang Pil Ho [NIS overseas division director]Support Role
- Kim Do HyunHa Dong Gyun [NIS crime info integration center team 1]Support Role
- Park Jin UCha Min Cheol [NIS field support team member]Support Role
- Kwon So HyunGoo Hyo Eun [NIS field support team member]Support Role
- Lee Kyung YoungLee In Hwan [NIS domestic division deputy director]Support Role
- Kim Min SangJeong Yong Tae [NIS director]Support Role
- Kim Byung GiBang Young Chan [NIS director]Support Role
- Yoo Oh SungBaek Mo SaSupport Role
- Hyun Bong SikChun Myung Ki [NIS server management agent]Support Role
- Jung Ji YoonKim Yeo Jin [NIS psychologist]Support Role
- Hwang HeeOh Kyung Seok [NIS ‘Black Sheep’ team agent]Support Role
- Jo Bok RaeKim Dong Wook [NIS ‘Black Sheep’ team agent]Support Role
- Jung Moon SungJang Chun WooSupport Role
- Joo Jong HyukYoon Chang KyuSupport Role
- Kim Eun WooPyo Jae GyooSupport Role
Guest Role
- Kwon Oh Jin[Boat surgeon] (Ep. 1)Guest Role
- Lim Dong Yoon[Boat crew member] (Ep. 1)Guest Role
- Park Young Bok[Father stowaway] (Ep. 1)Guest Role
- Seo Yeon Woo[Daughter stowaway] (Ep. 1)Guest Role
- Im Dong Min[Coast guard] (Ep. 1)Guest Role
- Choi Hee Jin[NIS Foreign Intelligence Bureau staff / Coast guard] (Ep. 1)Guest Role
- Hong Suk Bin[Psychiatrist] (Ep. 1)Guest Role
- Yeo Woon Bok[Doctor] (Ep. 1)Guest Role
- Lee Moo Nyoung[Taxi driver] (Ep. 1)Guest Role
- Shin Hee GookKim Jin Ho (Ep. 2)Guest Role
- Shin Moon SungJang Kwang Cheol [Huayang Gang member] (Ep. 2)Guest Role
- Song Yo Sep[Detective] (Ep. 2)Guest Role
- Yong Jin[Detective] (Ep. 2)Guest Role
- Lee Ji Young[Detective] (Ep. 2)Guest Role
- Yang Taek Ho[Huayang Gang member] (Ep. 2-3)Guest Role
- Lee Jae KyoonLee Choon Gil (Ep. 2-4)Guest Role
- Sung No JinHwang Mo Sul [Huayang Gang] (Ep. 2-4)Guest Role
- Lee Yong Yi[Choon Gil's aunt] (Ep. 3)Guest Role
- Heo Na Kyung[Hotel Receptionist] (Ep. 3)Guest Role
- Ok Ja YeonLin Wei [China Ministry of State Security agent] (Ep. 3-4, 8)Guest Role
- Yoo Soon Chul[Chemist] (Ep. 3, 11)Guest Role
- Son Sang GyuChoi Il Rak (Ep. 4)Guest Role
- Ki HwanJang Ho Sung [Reporter] (Ep. 4)Guest Role
- Lee So GeumMr. Kim (Ep. 4)Guest Role
- Kim Tae Hoon[Network administrator] (Ep. 4)Guest Role
- Moon Hak Jin[Network administrator] (Ep. 4)Guest Role
- Kim Byung ChulKim Jin Young [Agent] (Ep. 4, 9-11)Guest Role
- Ahn Ji HoChoi Sang Gyun (Ep. 4-5, 11-12)Guest Role
- Yoon Jong Goo[Detective] (Ep. 5)Guest Role
- Hwang Hee Jung[Psychiatry clinic staff] (Ep. 5)Guest Role
- Kim Ji WooHan Ji Hyuk [Child] in (Ep. 5)Guest Role
- Park Ji YunJung Eun Hee (Ep. 5-6)Guest Role
- Kim Young SunSeo Yoon Jung [Psychiatrist] (Ep. 5, 7)Guest Role
- Kim Ji SungJung Ki Sun [Reporter]( Ep. 5-6, 12)Guest Role
- Lee Sung IlMr. Kim (Ep. 5, 7-8, 10)Guest Role
- Kim Mi Hye[Daekook Ilbo reporter] (Ep. 6)Guest Role
- Park Joon Sang[NIS Agent] (Ep. 6)Guest Role
- Lee Seung Jin[NIS Agent] (Ep. 6)Guest Role
- Park Jung PyoBae Jong Soo (Ep. 6-7)Guest Role
- Lee Bum Chan[NFS medical examiner] (Ep. 7)Guest Role
- Choi Yi Sun[Daejin Hospital staff] (Ep. 7)Guest Role
- Noh Eun Ha[Daejin receptionist] (Ep. 7)Guest Role
- Seo Ye Hee[Mr. Kim's wife] (Ep. 7)Guest Role
- Park Tae San[Gang member] (Ep. 7)Guest Role
- Jeon Young WoonChun Pyung Il (Ep. 7-8)Guest Role
- Eom Ji ManJi Gook Chul (Ep. 7, 12)Guest Role
- Lee Gyu Sub[Baek Mo Sa's subordinate] (Ep. 7, 12)Guest Role
- Lee Jae WooYoon Seung Chan (Ep. 8)Guest Role
- Baek Jong Seung[Park Young Joo's husband] (Ep. 8)Guest Role
- Jang Eui DonAttorney Choi (Ep. 8-9)Guest Role
- Kwon Tae WonSeo Jung Mo (Ep. 8, 10)Guest Role
- Jeon Jin KiJo Nam Jae (Ep. 8, 10)Guest Role
- Lee Joon HyukShin Su Yong [Planet Chairman] (Ep. 8-10, 12)Guest Role
- Moon Seung Bae[Baek Mo Sa's subordinate] (Ep. 9)Guest Role
- Bae Gi BeomWon Woo Hyun (Ep. 9)Guest Role
- Nam Myung Ryul[Priest] (Ep. 11)Guest Role
- Lee Dong Kyu[Memorial speaker] (Ep. 11)Guest Role
- Shin Min Soo[Memorial attendee] (Ep. 11)Guest Role
- Jang Joon HyunKim Young Chul (Ep. 11-12)Guest Role
- Ahn Sung BongKim Young WooGuest Role
- Jung Young Hoon[Do Jin Sook's subordinate]Guest Role
- Im Chul HyungKim Dong HwanGuest Role
- Ahn Jung Ho[Agent]Guest Role
- Park Won SangNam Seon WooGuest Role
- Park Hyuk KwonLee Myung CheolGuest Role
- Jung Han Bin[Agent] (Ep. 1)Guest Role
- Kim Min Ki[Agent] (Ep. 6)Guest Role
- Nam Tae HoonJeon Heung SikGuest Role
- Ko Seo Jeong[Nurse] (Ep. 7)Guest Role
- Hwang Doo Ha[Subordinate]Guest Role
- Yook Hyun Suk[VIP hospital security guard] (Ep. 11)Guest Role
- Jung Hyun Chul[Apartment neighbor] (Ep. 1)Guest Role
- Choi Wook(Ep. 4)Guest Role
- Kim Gui SeonRi Dong ChulGuest Role
- Jung Da On[Bank security guard] (Ep. 12)Guest Role
- Kim Kwi SeonRi Dong ChulGuest Role
Unknown
- Baek Woo Young Unknown
- Baek Bum Suk Unknown
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