Kang Nam-gil

as Cho Man-bok (2 episodes)

as Oh Chang-Soo (105 episodes)

as Kang Dae-sik (16 episodes)

as Lee Gye-Dong (100 episodes)

as Jung Kang-Sik (50 episodes)

as Brain Security (2 episodes)

as Yoo Tak's dad (8 episodes)

as Seo Joon-suk (16 episodes)

as Han Man-ho (16 episodes)

as Song Deok-Gu (120 episodes)

as Choi Myung-shik (16 episodes)

as Jung In-sung (44 episodes)

as Han Sang-hoon (20 episodes)

as Kang Woo-cheol (16 episodes)

as Na Se-dol (120 episodes)

as Kim Gool-Jong (60 episodes)

as Hong Kyu-Man (125 episodes)

as Oh Ki-dong (16 episodes)

as Watanabe (36 episodes)

as Son Il-gun (17 episodes)

as Kim Tak-gu (16 episodes)

as Hong Moon-Gu (167 episodes)

as Jo Gi-dong (16 episodes)