Mary Kills People

Lee Bo-young

as

Wu So-jung

Lee Min-ki

as

Cho Hyeon-woo

Kang Ki-young

as

Choi Dae-hyeon

Bek Hyun-jin

as

Koo Kwang-cheol

Kim Tae-woo

as

Ahn Tae-seong

Yoon Ga-i

as

Choi Ye-na

Kwon Hae-hyo

as

Father Yang

Seo Young-hee

as

Ryu Yi-su

Yoo Seung-mok

Kang Na-eon

as

Wu-mi

Tae Hang-ho

as

Detective Bu

Kwak Sun-young

as

Koo Hye-rim