Seo Hyun-chul

as So Gyeong-dong (16 episodes)

as Self (1 episode)

as Department head (2 episodes)

as Jang Rye-ji (1 episode)

as Seo Byeong-joo (1 episode)

as Jeong Yong-jik (12 episodes)

as Cha Ho-yeol (12 episodes)

as Hwang Kyeong-cheol (16 episodes)

as Seo Hyeon-cheol (24 episodes)

as Seo Hyun-sik (12 episodes)

as Dong-woo

as Pilot Baek

as Jo Pan-shik (16 episodes)

as Jang Joong-kyu (16 episodes)

as Joo Dong-il (16 episodes)

as Baek Cham (24 episodes)

as Jeong Hong-sik (12 episodes)

as Yoo-jin's stepfather (1 episode)

as Self (9 episodes)

as Chief Detective

as Hyun-Joo's father (32 episodes)

as Oh Dae-yong (32 episodes)

as Lim Seung-man