송영규

Detective Squad Chief Choi

Gui-nam

Jeong Kyung-han

Detective Chief

CEO Han Gwang-Chul

Choi Yong-nam

-

-

-

Big sister Wang

-

Kim Ui-su

Yoon Hak-young

Ma Do-Nam

Lee Tae-yong

Kwi Kyung Kong

Min Yi-Bok

Park Jong Su

Director of Planning

Ma Seok-koo

Nam Sang-Koo

Kwak Moon Heum

Pil-Mok

Jang Sung-Soo

Nurhaci

Jang Cheol-Min

Jo Hyeong-Chul

Nam Jong-Gyu

Police University Professor

Yoon Se-hoon

Tak Young-Jin

Oh Sang-hoon

CEO Min Sang-ho

Choi Il-Joong

Song Young-sik

Heo Yeongmin

Byeon Sa Tto

-

[Institution director]

Hwang Yong-Woo