Kim Sang-kyung

as Ryu Jung-ho

Park Yong-woo

as Det. Kim Hyung-sa

Han Bo-bae

as Park Soo-yeon

Lee Jong-soo

as Detective Choi

Jung Il-woo

as Ryu Jung-ho (young)

Ham Eun-jung

as Kim Min-hee

Han Soo-yeon

as Jung Yoo-jin

Jeong Gyu-su

as Jo Ban-jang

Oh Jung-se

as Chang-bae

Song Boo-gun

as Chang-Bae's group 1

Kwak Min-seok

as Tourist 2

Jo Hyun-wu

as Firefighter 2

Kim Dong-ha

as Guy sitting in the next table

Son Bum-soo

as Moderator

Jung Hae-kyun

as Min-hee's home room teacher (voice)

Hwang Taek-ha

as Hostage

Jung Yoon-seo

as Madam at Western Style House

Jo Yeon-ho

as Suicidal man

Kim Jin-kook

as Detective 5

Kim Chae-hyun

as School play female MC

Oh Jeong-won

as Park Soo-yeon's mother