Jang Young-Nam
Do Jin Suk [NIS overseas division deputy director]
Lee Kyung-young
Lee In Hwan [NIS domestic division deputy director]
Ja-Yeon Ok
Lin Wei [China Ministry of State Security agent]
Hwang Hee
Oh Kyung Seok [NIS Black Sheep team agent]
Jung Ji-yoon
Kim Yeo Jin [NIS psychologist]
Min-Sang Kim
Jeong Yong Tae [NIS director]
Jong-Tae Kim
Kang Pil Ho [NIS overseas division director]
So-hyun Kwon
Goo Hyo Eun [NIS field support team member]
Park Jin-Woo
Cha Min Cheol [NIS field support team member]
Bok-rae Jo
Kim Dong Wook [NIS Black Sheep team agent]
Kim Do-hyun
Ha Dong Gyun [NIS crime info integration center team 1]
Bong-sik Hyun
Chun Myung Ki [NIS server management agent]
Jo Bok-rae
Kim Dong Wook [NIS Black Sheep team agent]