Season 1

Jeong Seok-yong

Kim Chang-soo

Lee Jin-hee

Jo Won-jin

Lee Sung-wook

Bae Heung-gon

Kim Young-ah

Lee Seon-ae

Choi Gwang-il

Goo Bon-pyeong

Kim Jong-goo

Kim Myeong-seop

Choi Deok-moon

Yang Eung-goo

Kim Woo-seok

Park Tae-Kyeong

Son Hyun-joo

Bu Seung-gwon

Kim Ji-won

Gye Su-jeong

Jang Seung-jo

Special appearance

Kwon Seung-woo

Ma Seong-gyoo

Heo Joon-seok

Kim Seong-jin

Yuna

Young patient Lee Joo-hee

Kim Jung-young

Yoo Mi-kyeong

Lee Jung-eun

Jeong Hee-sook

Kim Young-min

Do Yoon-sik

Choi Yeon-hwa

Patient

Kim Gyeong-min

Im Ho-seok

Kim Hak-Soo

Professor Hwang

Jang Myung-jin

Police

Lee Jeong-lim

-