Oh Chang-dae (2 episodes)
Police chief
Hee-sik's father (1 episode)
Yim Jong-gwon (16 episodes)
Kwak Sam-su (12 episodes)
Military Judge Yang Pil-kyu (3 episodes)
Sim Hui-won (17 episodes)
Police Chief
Gi-taek
Chinese restaurant owner (Eps 1,2) (2 episodes)
Vice-principal (16 episodes)
Mak-dong
Hong-gi
Koo Suk-Chan (32 episodes)
Han Min-Koo (32 episodes)
Park Min-Sik (32 episodes)
Park Do-Gyeom (16 episodes)
Choi Soo-Chan (100 episodes)
Heo Goo-Dong (16 episodes)
Manager Hwang (16 episodes)
Kang Joo-Chul (120 episodes)
Han Pyeong-man (24 episodes)
Jang Woo-hyun (20 episodes)
Artisan Chun
Kim Yong-ho
Gangster
Engineer Yong-bong
President Yang
Detective Woo
Lee Hee-chul
Choi Byeong-sam
Detective