Yeon Je-wook

as Kim Joo-seop (5 episodes)

as Yang-bae

as Park Jong-Hyun [Young] (2 episodes)

as Detective Ahn

as Section Chief Heo

as Jeong Ji-hyeon (16 episodes)

as Adult Woo-ram

as Gi-seok

as Cola

as Yeom Ki-tae (1 episode)

as Cheong-rok

as Sang-joon

as Patient

as Lee Jong-hyun (20 episodes)

as Sang-cheol

as Han-ki

as Koo-taek

as 현수

as Ahn Tae-jun

as Choi Sang-gyeong