Chief Producer
Director
Martial Arts Director
Music Editor
Producer
Screenwriter
Main Role
- Ji Chang Wook Main Role
- Park Min Young Main Role
- Yoo Ji Tae Main Role
Support Role
- Kim Mi KyungJo Min Ja [Hacker]Support Role
- Park Sang WonKim Moon Shik [Moon Ho's older brother]Support Role
- Do Ji WonChoi Myung Hee [Moon Shik's wife]Support Role
- Jung Kyu SooOh Tae Won [Moon Shik's assistant]Support Role
- Park Won SangJang Byung Se [Yeong Shin's boss]Support Role
- Choi Seung KyungReporter Yeo [Yeong Shin's colleague]Support Role
- Kim Jin HeeReporter Noh Sun Jae [Yeong Shin's colleague]Support Role
- Jang Sung BumLee Jong Soo [Moon Ho's assistant]Support Role
- Park Sang MyunChae Chi Soo [Yeong Shin's adoptive father]Support Role
- Woo HyunChul Min [Chi Soo's friend]Support Role
- Jo Han ChulYoon Dong Won [Cybercrime detective]Support Role
- Tae MiKang Dae Yong [Jung Hoo's aide]Support Role
- Woo Hee JinKang Min Jae [Moon Ho's boss]Support Role
- Park Sang WookBae Sang Soo [Double S Guard's CEO]Support Role
- Hong Seung JinYo Yo [Double S Guard thug]Support Role
- Oh Gwang RokKi Yeong Jae [Jung Hoo's teacher]Support Role
- Oh Jong HyukOh Gil Han [Ji An's father]Support Role
- Jung Hye InChoi Myung Hee [Young]Support Role
- Son Seung WonKim Moon Shik [Young]Support Role
- Ji Il JooSeo Jun Suk [Jung Hoo's father]Support Role
- Choi Dong GooKi Yeong Jae [Young]Support Role
- Gu Gun MinOh Ji An [Child]Support Role
- Kim Ri NaJoo Yeon Hee [Actress]Support Role
- Choi Jong WonPark Jung Dae / "Elder" [Moon Shik's boss]Support Role
- Jung Hae KyunHwang Jae Guk [Empire Entertainment's President]Support Role
- Yeo Ho Min[Detective]Support Role
- Choi Jung WonLee Jun BinSupport Role
Guest Role
- Wang Bit NaOh Sun Jung (Ep. 1-2)Guest Role
- Lee Moon ShikGo Sung Chul [Healer's client] (Ep. 1 & 3)Guest Role
- Lee Gyu HoYong Shik [Double S Guard thug] (Ep. 1, 3, 6, 20)Guest Role
- Jung Hyun Seok[Lab assistant] (Ep. 2)Guest Role
- Kim Yong Woon[Jae Guk's guard] (Ep. 2)Guest Role
- Shin Soo YunChae Yeong Shin [Young] (Ep. 2)Guest Role
- Kim So YeonChae Yeong Shin [Teen] (Ep. 2)Guest Role
- Jo Young JinKim Eui Chan [Congressman] (Ep. 3-4, 6, 10-11)Guest Role
- Lee Woo JooKim Moon Ho [Young] (Ep. 3 & 6)Guest Role
- Kim Seung ChanKim Moon Ho [Teen] (Ep. 3, 7, 10-11)Guest Role
- Ko Woo RimSeo Jung Hoo [Young] (Ep. 4)Guest Role
- Park Ji SoOh Ji An [Young] (Ep. 4 & 9)Guest Role
- Choi Jung HooSeo Jung Hoo [Child] (Ep. 4 & 11)Guest Role
- Lee Gyeong Shim[Jung Hoo's mother] (Ep. 4, 11-13)Guest Role
- Song Ji In[Jung Hoo's mother - Young] (Ep. 4 & 13)Guest Role
- Geum Kwang San[Ex-convict] (Ep. 7-8)Guest Role
- Park Shi JinSeo Jung Hoo [Teen] (Ep. 8, 10, 13-14)Guest Role
- Nam Hee SukMichele [Stylist] (Ep. 9)Guest Role
- Lee Seung WooKi Chan [Jung Hoo's step-brother] (Ep. 13)Guest Role
- Kang Pil Sun[Police Officer] (Ep. 15)Guest Role
- Jeon Hye BinKim Jae Yoon [Informant] (Ep. 20)Guest Role
- Lee Hyun Kul[Assassin] (Ep. 20)Guest Role
- Han Seo Yeon[Investigator]Guest Role
- Ham Jin Sung[Police officer]Guest Role
Unknown
- Im Seung Joon Unknown
- Park Dae Kyu Unknown
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