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)

Hahm 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