Composer
Director
Executive Producer
Screenwriter
Main Role
-
Hyun BinYoo Jin UMain Role -
Park Shin Hye Main Role
Support Role
-
Park HoonCha Hyeon Seok [CEO of Neword Soft]Support Role -
Lee Seung JunPark Seon Ho [Co-founder of J One]Support Role -
Min Jin WoongSeo Jeong Hun [Jin U's secretary]Support Role -
Kim Eui SungCha Byeong Jun [Hyeong Seok's father]Support Role -
Kim Yong RimO Yeong Sim [Hui Ju's grandmother]Support Role -
Lee ReJung Min Ju [Hui Ju's younger sister]Support Role -
Park Chan YeolJung Se Ju [Hui Ju's younger brother]Support Role -
Lee Hak JooKim Sang Beom [Hui Ju's friend]Support Role -
Jo Hyun ChulChoi Yang Ju [Head of R&D Center Research Team]Support Role -
Lee Shi WonLee Su Jin [Jin U's first ex-wife / Hyeong Seok's wife]Support Role -
Han Bo ReumKo Yu Ra [Jin U's second ex-wife]Support Role -
Park Jin UNo Yeong Jun [Yu Ra's manager]Support Role -
Lee Jae WookMarco Han [Programmer / Hacker] (Ep. 8-9, 13)Support Role
Guest Role
-
Park Hae Soo[Agent A] (Ep. 1-2, 4, 8)Guest Role -
Kim Do Yeon[Tenant at Bonita Hostel / Medical student] (Ep. 2-3, 5)Guest Role -
Ryu AbelLee Su Gyeong [Su Jin's sister] (Ep. 2, 4, 7)Guest Role -
Jeong Min Sung[Hui Ju's father] (Ep. 3)Guest Role -
Choi Yeon Ho[Hui Ju's mother] (Ep. 3)Guest Role -
Lee Chae YoonJung Hui Ju [Young] (Ep. 3)Guest Role -
Kim Joon EuiJung Se Ju [Young] (Ep. 3)Guest Role -
Park Chae HeeJung Min Ju [Young] (Ep. 3)Guest Role -
Lee Do Hyun[Korean Consulate representative] (Ep. 4-5)Guest Role -
Kang Ro Chae[J One employee] (Ep. 4, 8)Guest Role -
Kim Hyun Mok[J One employee] (Ep. 7, 10, 13, 16)Guest Role -
Park Seul Ki[Reporter] (Ep. 7, 16)Guest Role -
Hwang Bo Mi[Anchorwoman] (Ep. 7, 16)Guest Role -
Son Kyung WonO Yeong Sik [J One director] (Ep. 11-13, 15-16)Guest Role -
Song Young GyuChoi Jeong Hyeok [Doctor] (Ep. 15)Guest Role -
Isle Han[Gamer] (Ep. 16)Guest Role -
Yoo Young Bin[Researcher]Guest Role -
Kim Joo Young[University student]Guest Role -
Park Sang Hwi[Granada Branch officer]Guest Role -
Park Jong Jin[Himself]Guest Role -
Eom Seong Seop[Himself]Guest Role -
Moon Jung Gi Guest Role -
Hong Boo Hyang Guest Role -
Carla Avila Guest Role
Unknown
-
Bret Allan Lindquist Unknown -
Yoon Jae Hyun Unknown
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