Park Joong-hoon

as Hwang Jae-sung

Lee Sun-kyun

as Jeong Eui-chan

Lee Sung-min

as Detective Jo

Kim Jung-tae

as Detective Song

Ko Joo-yeon

as Soo-yeon

Han Soo-yeon

as Hyun-sook

Kang Ki-hwa

as Hye-jin

Jeong Do-won

as Detective Shin

Ahn Yong-jun

as Detective Kim

Im Won-hee

as Ph.D Ko

Lee Han-wi

as Lee Yong-kab

Sung Yeol-seok

as Metropolitan Detective

Lee Seung-cheol

as Hyun-sook's father

Kim So-jin

as Mapo Detective

Jang So-yeon

Yoon Sung-won

Oh Seong-soo

as Detective

Bae Yong-geun

as Investigator

Kim Woon

as Conscripted Policeman