Yoo Seung-il

as Farmer (1 episode)

as Detective (1 episode)

as Cha Man-deok (16 episodes)

as Min In Soo (1 episode)

as [General contractor] (2 episodes)

as Cheon-ho's father (1 episode)

as Angry Professor (1 episode)

as Detention Center Head (1 episode)

as Chief director (1 episode)

as Tae-hyeon (태현)