Healer

Chief Producer

• 
  Bae Kyung Soo

Director

• 
  Lee Jung Sub
• 
  Kim Jin Woo

Martial Arts Director

• 
  Jung Doo Hong

Music Editor

• 
  Lee Pil Ho

Producer

• 
  Mo Wan Il

Screenwriter

• 
  Song Ji Na

Main Role

• 
  Ji Chang Wook

  Seo Jeong Hu / "Healer"

  Main Role
• 
  Park Min Young

  Chae Yeong Sin / O Ji An

  Main Role
• 
  Yoo Ji Tae

  Kim Mun Ho

  Main Role

Support Role

• 
  Kim Mi Kyung

  Cho Min Ja [Hacker]

  Support Role
• 
  Park Sang Won

  Kim Mun Sik [Mun Ho's older brother]

  Support Role
• 
  Do Ji Won

  Choi Myeong Hui [Mun Sik's wife]

  Support Role
• 
  Jung Kyu Soo

  O Tae Won [Mun Sik's assistant]

  Support Role
• 
  Park Won Sang

  Jang Byeong Se [Yeong Sin's boss]

  Support Role
• 
  Choi Seung Kyung

  Reporter Yeo [Yeong Sin's colleague]

  Support Role
• 
  Kim Jin Hee

  No Seon Jae [Yeong Sin's colleague / Reporter]

  Support Role
• 
  Jang Sung Bum

  Lee Jong Su [Mun Ho's assistant]

  Support Role
• 
  Park Sang Myun

  Chae Chi Su [Yeong Sin's adoptive father]

  Support Role
• 
  Woo Hyun

  Cheol Min [Chi Su's friend]

  Support Role
• 
  Jo Han Chul

  Yun Dong Won [Cybercrime detective]

  Support Role
• 
  Tae Mi

  Kang Dae Yong [Jeong Hu's aide]

  Support Role
• 
  Woo Hee Jin

  Kang Min Jae [Mun Ho's boss]

  Support Role
• 
  Park Sang Wook

  Bae Sang Su [Double S Guard's CEO]

  Support Role
• 
  Hong Seung Jin

  Yo Yo [Double S Guard thug]

  Support Role
• 
  Oh Gwang Rok

  Ki Yeong Jae [Jeong Hu's teacher]

  Support Role
• 
  Oh Jong Hyuk

  O Gil Han [Ji An's father]

  Support Role
• 
  Jung Hye In

  Choi Myeong Hui [Young]

  Support Role
• 
  Son Seung Won

  Kim Mun Sik [Young]

  Support Role
• 
  Ji Il Joo

  Seo Jeon Seok [Jeong Hu's father]

  Support Role
• 
  Choi Dong Goo

  Ki Yeong Jae [Young]

  Support Role
• 
  Gu Gun Min

  O Ji An [Child]

  Support Role
• 
  Kim Ri Na

  Ju Yeon Hui [Actress]

  Support Role
• 
  Choi Jong Won

  Park Jeong Dae / "Elder" [Mun Sik's boss]

  Support Role
• 
  Jung Hae Kyun

  Hwang Jae Guk [Empire Entertainment's president]

  Support Role
• 
  Yeo Ho Min

  [Detective]

  Support Role
• 
  Choi Jung Won

  Lee Jun Bin

  Support Role

Guest Role

• 
  Wang Bit Na

  O Seon Jeong (Ep. 1-2)

  Guest Role
• 
  Lee Moon Shik

  Ko Seong Cheol [Healer's client] (Ep. 1, 3)

  Guest Role
• 
  Lee Gyu Ho

  Yong Sik [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 Yun

  Chae Yeong Sin [Young] (Ep. 2)

  Guest Role
• 
  Kim So Yeon

  Chae Yeong Sin [Teen] (Ep. 2)

  Guest Role
• 
  Jo Yeong Jin

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

  Guest Role
• 
  Lee Woo Joo

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

  Guest Role
• 
  Kim Seung Chan

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

  Guest Role
• 
  Ko Woo Rim

  Seo Jeong Hu [Young] (Ep. 4)

  Guest Role
• 
  Park Ji So

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

  Guest Role
• 
  Choi Jung Hoo

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

  Guest Role
• 
  Lee Gyeong Shim

  [Jeong Hu's mother] (Ep. 4, 11-13)

  Guest Role
• 
  Song Ji In

  [Jeong Hu's mother - Young] (Ep. 4, 13)

  Guest Role
• 
  Geum Kwang San

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

  Guest Role
• 
  Park Shi Jin

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

  Guest Role
• 
  Nam Hee Suk

  Michele [Stylist] (Ep. 9)

  Guest Role
• 
  Lee Seung Woo

  Ki Chan [Jeong Hu's step-brother] (Ep. 13)

  Guest Role
• 
  Kang Pil Sun

  [Police officer] (Ep. 15)

  Guest Role
• 
  Jeon Hye Bin

  Kim Jae Yun [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