as Yu-il’s Father(12 eps)
as Ji-cheol
as Coach
as Coach(50 eps)
as Self(8 eps)
as Yang Dong-gu(16 eps)
as Kim Cheol-seok(12 eps)
as Gong Su-pyo(12 eps)
as King(20 eps)
as Kwon Hyuk-pil(16 eps)
as Lee Jong-hyuk(24 eps)
as Dong Gwan-Soo(16 eps)
as Sang-cheol
as Colonel Shin(6 eps)
as Lee Hyung Seok(32 eps)
as Choi Gi-chul
as Oh Ki-Wan(32 eps)
as Teacher
as Self(1 ep)
as Gyu-hyeon
as Sang Bong-tae(12 eps)
as Self(1 ep)
as Dong-min
as Self(1 ep)
as Sung Sun-woo (older) (voice)(1 ep)
as Kang Suk-joon(16 eps)
as Joon-seob
as Self - Student(36 eps)
as Self(1 ep)
as Park Min-joon(50 eps)
as Young Ho(10 eps)
as Seo Byung-hoon(16 eps)
as [Man in the street](1 ep)
as Self(55 eps)
as Lee Jung-rok(20 eps)
as Baek Kyung-min
as Park Ju Yeong
as Jung Il-do(16 eps)
as Kim Tae-ho(56 eps)
as Lee Kang-seong
as Hwang Chul-woong(24 eps)
as Seo Jong-cheol
as Yoo Gwan-pil(16 eps)
as Ha Chang-ryong(14 eps)
as K
as Han Dong-min
as Jin Muyeong(20 eps)
as Self(1 ep)
as Fox 2
as Lee Hyun Chul(16 eps)
as Gangster Protagonist in the Movie
as Jung Woo-Jin
as Seok Hee-jung(16 eps)
as Park Dong-jae(16 eps)
as Squad Leader Shin
as Shin Hyun-tae(22 eps)
as Shin Seok-gi
as Cha Jong-hoon
as Gang Member
as Special Agent, North Korean 8th Squad