유태웅

Lee Min-Tae

Cha Ho-chul

Jo Dong-Man

Han Jung-Sik

Director Kim [Seung Joon's secretary]

Hwang Pil Young [Black Ops Team Leader]

Shin Ma-jeok

Journalist Oh

Sa Gi-Jin

Tae Ik's father

Jung Jae-Gyu

Northern investigative general

Detective Kang