Kim Kang-woo

as Director Han

as Do-jin

as Kim Sun-woo

as Ji-ho

as Baek Kwang-hyun

as Park Jin-han

as Investigator

as Prince Yeonsan

as Dong-joon

as Lee Woo-gon

as Tae-kyu

as Kim

as Jung-ha's Younger Brother (cameo)

as Yang Choon-dong

as Joo Young-jak

as Robot Repairman Park Do-won

as Kim Cheol

as Kang Jeongho

as Kang Hyun-woo

as Chun-soo

as Kyu-chul

as Cho Kyung-yoon

as Sung-chan

as Ju-ho

as Min-ho

as Private Cho