Director
Screenwriter
Main Role
- Yeon Woo Jin Main Role
- Jung Yoo Mi Main Role
- Park Yong Woo Main Role
Support Role
- Son Jong HakGoo Do Gyun [Detective / Member of 634 Regia]Support Role
- Oh Yeon AhShin Mi Yeon / Angela [Gallery Manager / Member of 634 Regia]Support Role
- Yu BeeJung Yong Pil [Member of 634 Regia]Support Role
- Lee Dong HaJung Tae Hyun [Psychiatrist]Support Role
- Kang Kyung HunCha Seon Young [Eun Ho's friend]Support Role
- Jang Won HyungJang Won Suk [Doctor]Support Role
- Cha Min JiJang Kyung Ran [Detective]Support Role
- Lee Gun MyungLee Gi HongSupport Role
- Lee Young SukBishop Kwak [Priest]Support Role
- Jang Hee RyungKim Yoo Ri [Doctor]Support Role
- Jang Jung YeonJo Hyung RaeSupport Role
- Choi Yu RiCha Young Jin [Seon Young's daughter]Support Role
- Jo Yong JinOh Soo Min [Young]Support Role
- Yang Jo AhMs. Sung [Nurse]Support Role
Guest Role
- Park Min SuKim Woo Joo [Patient] (Ep. 1-3, 14)Guest Role
- Lee Na Ra[Woo Joo's mother] (Ep. 1-3, 14)Guest Role
- Park Jung WonSong Mi So [Doctor] (Ep. 1-4, 13-16)Guest Role
- Jeon Jin KiJung Hyung Seo / Ignatius [Priest] (Ep. 1, 9)Guest Role
- Gam So HyunHam 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 WookSeo Jae Moon [Licensed Practical Nurse] (Ep. 5-7) | Father Antonio (Ep. 15-16)Guest Role
- Jung Suk Yong[Professor] (Ep. 7)Guest Role
- Moon SookLee Hae Min [Sister] (Ep. 8-12, 16)Guest Role
- Bae Eun Woo[Nurse] (Ep. 13)Guest Role
- Ji Il JooKim 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 KookSamaelGuest Role
- Kim Kwang ShikSul 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
- Kang Sung Wook[Security guard]Guest Role
- Jang Won ChulSanta ClausGuest Role
- Park Chan WooPriestGuest Role
Unknown
- Kim Sang Bo Unknown
- Kim Soo Yeon Unknown
- Son Young Sun Unknown
- Park Yun Unknown
- Jin Shi Won Unknown
- Im Ho Joon Unknown
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