송영규

Detective Squad Chief Choi

Gui-nam

Jeong Kyung-han

Detective Chief

Choi Yong-nam

-

Big sister Wang

CEO Han Gwang-Chul

-

-

Kim Ui-su

-

Ma Do-Nam

Yoon Hak-young

Kwi Kyung Kong

Lee Tae-yong

Park Jong Su

Min Yi-Bok

Director of Planning

Nam Sang-Koo

Ma Seok-koo

Jang Sung-Soo

Pil-Mok

Police University Professor

Nam Jong-Gyu

Kwak Moon Heum

Jang Cheol-Min

Nurhaci

Jo Hyeong-Chul

Tak Young-Jin

Yoon Se-hoon

Oh Sang-hoon

Choi Il-Joong

CEO Min Sang-ho

Song Young-sik

Heo Yeongmin

Byeon Sa Tto

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[Institution director]

Hwang Yong-Woo