Song Young-gyu

As Choi Yong-nam

As CEO Han Gwang-Chul

As Detective Chief

As Detective Squad Chief Choi

As Gui-nam

As Big sister Wang

As Jeong Kyung-han

As Heo Yeongmin

As Kwak Moon Heum

As Lee Tae-yong

As [Institution director]

As Oh Sang-hoon

As Yoon Hak-young

As Kwi Kyung Kong

As Pil-Mok

As Jang Sung-Soo

As Hwang Yong-Woo

As Choi Il-Joong

As Nurhaci

As Nam Sang-Koo

As Tak Young-Jin

As Nam Jong-Gyu

As Jo Hyeong-Chul

As CEO Min Sangho

As Min Yi-Bok

As Police University Professor

As Ma Do-Nam

As Byeon Sa Ddo

As Jang Cheol-Min

As Director of Planning

As Ma Seok-koo

As Park Jong Su