Park Yong-woo as Detective Kang

Namkoong Min as Min-woo

Wang Ji-hye as Soo-yeon

Lee Ki-young as Lee Ki-chul

Kim Dong-ha as Jo Sang-tae

Kim Eung-soo as Chief Detective

Oh Jung-se as Yoo Chang-won

Kim Byeong-ok as Suk-jae

Lee Jae-gu as Doctor

Park Byung-eun as Detective Min

Jeong Gi-seop as Det. Kam Chal-ban

Jo Kyung-sook as Exam Studying Area Woman

Yoo Ha-bok as Detective

Lee Seung-won as Police Officer

Lim Jeong-woon as Police Officer

Jeon Jin-gi as Detective Lee

Jeong Ae-hwa as Yogurt Drink Saleswoman

Jung Mi-nam as Detective Kang's Father

Kim Kwang-shik as Detective Ahn