Kim Woo-hyun

as Park Yong-goo (14 episodes)

as Jisan Hospital / Downtown Haava

as Grocery Store Robber

as Thug who is hit by alcohol glass (1 episode)

as Kim Yang-ho's Subordinate 4

as Kang Byung-tae (2 episodes)

as Pil-do's Subordinate 1

as Jisan Hospital / Downtown Haava

as Do-mi

as Viper Gang Member 5

as Sergeant Hwang's Soldier