The Devil's Stairway

Kim Jin-kyu

as

Hyeon Gwang-ho

Moon Jeong-suk

as

Nam Jin-suk

Jeong Ae-ran

as

Head Nurse

Choi Nam-hyun

as

Oh Sang-gil

Dokgo Sung

as

Detective

Bang Seong-ja

as

Oh Jung-ja

Yu Gye-seon

as

Jeong-ja's Mot...

Lee Hae-ryong

as

Doctor

Lim Hae-rim

as

Hospital Secur...

Kim Kyeong-ran

as

Maid

Kim Ki-beom

as

Forensic Staff

Chang Hyeok

as

Detective

Jo Hang

as

Detective Squa...

Lee Up-dong

as

Worker

Ji Bang-yeol

as

Doctor