송영규

Ryu Gwang-pil

Kim Min-jung

Yoon Se-hoon

Song Young-sik

Detective Chief

Choi Yong-nam

Yoon Hak-young

[Institution director]

Park Jong Su

Jeong Kyung-han

Han Je Moon

Baek Yeong-cheol

Janitor

Kwak Moon Heum

Gui-nam

Ma Seok-koo

Oh Sang-hoon

Detective Squad Chief Choi

Jang Cheol-Min

Police University Professor

Ma Do-Nam

CEO Min Sang-ho

Min Yi-Bok

Lawyer

Jang Sung-Soo

Byeon Sa Tto