한재석
— Sang-kil
김수로
— Lee Do-yeop
Ryu Seung-ryong
— Kim Sang-do
장영남
— Jang Pal-nyeo
Ryu Deok-hwan
— Oh Cheol-ju
심은경
— Kim Yeo-na
Im Won-hee
— Lee Joon-sang
신하균
— Doctor of Engineering
Jung Jae-young
— Man in Taekwondo uniform
장진
— Captain Ma (uncredited)
Gong Ho-seok
— Officer Gong (uncredited)
안수호
— Bureau Director (uncredited)
한예주
— Han Soon-kyung
박경만
— Park Joon-seo
Park Jeong-gi
— Police