Lee Sung-woo

as Hwang Il-Guk (6 episodes)

as Cult leader (1 episode)

as Lim Woo-Sung (1 episode)

as Basement Demon 1

as Labor Broker (2 episodes)

as Pung-gi

as Gang member (2 episodes)

as Used car dealer

as Jeong-bae

as Manager Han

as Jung Gyeong-Seok (1 episode)

as Kim Young-sam / Player 226 (5 episodes)

as forefront

as Won Jae

as Detective Lee

as Detective Moon of Mokpo Police Station

as Sedan Man

as Drug dealer (1 episode)

as Doo-sik

as Jang Seon-du (32 episodes)

as Arresting Detective 1

as Gangster #3 (3 episodes)

as Yeon-hee's Recording Studio Engineer

as Yu-baek's bodyguard

as Boss Gu's Gang 2