Lee Kyu-seop

as Prisoner 5161 (2 episodes)

as Gangster (1 episode)

as Debt Collector (1 episode)

as Kang Ho Chul [Prisoner] (2 episodes)

as Cho Tae-sin's Subordinate (1 episode)

as [Father of Na Hee's patient] (2 episodes)

as [Thug in parking lot car wash area] (16 episodes)

as Woo Gwi-nam's Subordinate 1

as Kang Yong-woo (1 episode)

as Broker (1 episode)

as Rowdy (18 episodes)

as Good-for-nothing (16 episodes)

as Neighborhood Thug 1

as Kkakdugi 1

as Work Group Member 1

as Burly Henchman 1

as Hyun-chul

as Drug Peddler's Associate 2

as Riot Police Officer 3

as Waiter 1

as Haitai's Kim Jun-hwan

as Extra

as Goguryeo, General

as Tae-won's Crew Member 10

as Mal-ho's Gang