Priest

Director

• 
  Kim Jong Hyun

Screenwriter

• 
  Moon Man Se

Main Role

• 
  Yeon Woo Jin

  O Su Min / Michael

  Main Role
• 
  Jung Yoo Mi

  Ham Eun Ho

  Main Role
• 
  Park Yong Woo

  Moon Ki Sun / Peter

  Main Role

Support Role

• 
  Son Jong Hak

  Goo Do Gyun [Detective / Member of 634 Regia]

  Support Role
• 
  Oh Yeon Ah

  Shin Mi Yeon / Angela [Gallery Manager / Member of 634 Regia]

  Support Role
• 
  Yu Bee

  Jung Yong Pil [Member of 634 Regia]

  Support Role
• 
  Lee Dong Ha

  Jung Tae Hyun [Psychiatrist]

  Support Role
• 
  Kang Kyung Hun

  Cha Seon Young [Eun Ho's friend]

  Support Role
• 
  Jang Won Hyung

  Jang Won Suk [Doctor]

  Support Role
• 
  Cha Min Ji

  Jang Kyung Ran [Detective]

  Support Role
• 
  Lee Gun Myung

  Lee Gi Hong

  Support Role
• 
  Lee Young Suk

  Bishop Kwak [Priest]

  Support Role
• 
  Jang Hee Ryung

  Kim Yoo Ri [Doctor]

  Support Role
• 
  Jang Jung Yeon

  Jo Hyung Rae

  Support Role
• 
  Choi Yu Ri

  Cha Young Jin [Seon Young's daughter]

  Support Role
• 
  Jo Yong Jin

  Oh Soo Min [Young]

  Support Role
• 
  Yang Jo Ah

  Ms. Sung [Nurse]

  Support Role

Guest Role

• 
  Park Min Su

  Kim Woo Joo [Patient] (Ep. 1-3, 14)

  Guest Role
• 
  Lee Na Ra

  [Woo Joo's mother] (Ep. 1-3, 14)

  Guest Role
• 
  Park Jung Won

  Song Mi So [Doctor] (Ep. 1-4, 13-16)

  Guest Role
• 
  Jeon Jin Ki

  Jung Hyung Seo / Ignatius [Priest] (Ep. 1, 9)

  Guest Role
• 
  Gam So Hyun

  Ham Eun Ho [Young] (Ep. 3)

  Guest Role
• 
  Bae Jung Hwa

  [Soo Min's mother] (Ep. 3)

  Guest Role
• 
  Kang Shin Chul

  [Soo Min's father] (Ep. 3, 9)

  Guest Role
• 
  Kim Ha Neul

  (Ep. 5)

  Guest Role
• 
  Yeon Je Wook

  Seo Jae Moon [Licensed Practical Nurse] (Ep. 5-7) | Father Antonio (Ep. 15-16)

  Guest Role
• 
  Jung Suk Yong

  [Professor] (Ep. 7)

  Guest Role
• 
  Moon Sook

  Lee Hae Min [Sister] (Ep. 8-12, 16)

  Guest Role
• 
  Bae Eun Woo

  [Nurse] (Ep. 13)

  Guest Role
• 
  Ji Il Joo

  Kim Joon Ho [Patient] (Ep. 13-14)

  Guest Role
• 
  Jang Se Ah

  [Nun] (Ep. 16)

  Guest Role
• 
  Han Hye Ji

  [Nurse] (Ep. 18)

  Guest Role
• 
  Kim Hong Kook

  Samael

  Guest Role
• 
  Kim Kwang Shik

  Sul Hyun [Doctor / Center Manager]

  Guest Role
• 
  Lee Yoo Jin

  [Nurse]

  Guest Role
• 
  Cha Yoo Joo

  [Patient]

  Guest Role
• 
  Kim Seol Jin

  [Evil spirit]

  Guest Role
• 
  Lee Moo Nyoung

  [Guardian]

  Guest Role
• 
  Lee Yang Hee

  [Hospital director]

  Guest Role
• 
  Heo Yoon

  [Emergency nurse]

  Guest Role
• 
  Yoon Jung Sub Guest Role
• 
  Kim Joo Hee Guest Role
• 
  Kim Min Kyung Guest Role
• 
  Kyung Sung Hwan Guest Role
• 
  Hong Joon Ki Guest Role
• 
  Lee Eun Saem Guest Role
• 
  Choi Na Moo Guest Role
• 
  Park Chan Woo

  Priest

  Guest Role
• 
  Kang Sung Wook

  [Security guard]

  Guest Role
• 
  Hyun Ri Won

  [Emergency nurse 3]

  Guest Role
• 
  Jang Won Chul

  Santa Claus

  Guest Role

Unknown

• 
  Kim Sang Bo Unknown
• 
  Kim Soo Yeon Unknown
• 
  Son Young Soon Unknown
• 
  Park Yun Unknown
• 
  Jin Shi Won Unknown
• 
  Im Ho Joon Unknown