Pemeran Healer

Ji Chang Wook (지창욱)

as Seo Jeong Hu / Healer

Pemeran Utama

Park Min Young (박민영)

as Chae Yeong Sin / O Ji An

Pemeran Utama

Yoo Ji Tae (유지태)

as Kim Mun Ho

Pemeran Utama

Kim Mi Kyung

as Cho Min Ja [Hacker]

Pemeran Pembantu

Jo Han Chul

as Yun Dong Won [Cybercrime detective]

Pemeran Pembantu

Hong Seung Jin

as Yo Yo [Double S Guard thug]

Pemeran Pembantu

Jung Hye In

as Choi Myeong Hui [Young]

Pemeran Pembantu

Son Seung Won

as Kim Mun Sik [Young]

Pemeran Pembantu

Choi Dong Goo

as Ki Yeong Jae [Young]

Pemeran Pembantu

Gu Gun Min

as O Ji An [Child]

Pemeran Pembantu

Kim Ri Na

as Ju Yeon Hui [Actress]

Pemeran Pembantu

Yeo Ho Min

as [Detective]

Pemeran Pembantu

Choi Jung Won

as Lee Jun Bin

Pemeran Pembantu

Wang Bit Na

as O Seon Jeong (Ep. 1-2)

Bintang Tamu

Lee Gyu Ho

as Yong Sik [Double S Guard thug] (Ep. 1, 3, 6, 20)

Bintang Tamu

Jung Hyun Seok

as [Lab assistant] (Ep. 2)

Bintang Tamu

Shin Soo Yun

as Chae Yeong Sin [Young] (Ep. 2)

Bintang Tamu

Kim So Yeon

as Chae Yeong Sin [Teen] (Ep. 2)

Bintang Tamu

Jo Yeong Jin

as Kim Ui Chan [Congressman] (Ep. 3-4, 6, 10-11)

Bintang Tamu

Lee Woo Joo

as Kim Mun Ho [Young] (Ep. 3, 6)

Bintang Tamu

Kim Seung Chan

as Kim Mun Ho [Teen] (Ep. 3, 7, 10-11)

Bintang Tamu

Ko Woo Rim

as Seo Jeong Hu [Young] (Ep. 4)

Bintang Tamu

Park Ji So

as O Ji An [Young] (Ep. 4, 9)

Bintang Tamu

Choi Jung Hoo

as Seo Jeong Hu [Child] (Ep. 4, 11)

Bintang Tamu

Geum Kwang San

as [Ex-convict] (Ep. 7-8)

Bintang Tamu

Park Shi Jin

as Seo Jeong Hu [Teen] (Ep. 8, 10, 13-14)

Bintang Tamu

Nam Hee Suk

as Michele [Stylist] (Ep. 9)

Bintang Tamu

Kang Pil Sun

as [Police officer] (Ep. 15)

Bintang Tamu

Jeon Hye Bin

as Kim Jae Yun [Informant] (Ep. 20)

Bintang Tamu

Lee Hyun Kul

as [Assassin] (Ep. 20)

Bintang Tamu

Han Seo Yeon

as [Investigator]

Bintang Tamu

Ham Jin Sung

as [Police officer]

Bintang Tamu

Bae Kyung Soo

Chief Producer

Lee Jeong Seop

Sutradara

Kim Jin U

Sutradara

Jung Doo Hong

Martial Arts Director

Lee Pil Ho

Music Editor

Mo Wan Il

Producer

Song Ji Na

Screenwriter