Kim Ki-moo

as Threat

as Yoon Woo-myeong

as Jang Woo-seok (16 episodes)

as Dog stealer (1 episode)

as Hong Jeong-soo (16 episodes)

as Violent driver (1 episode)

as Studio

as Detective Gong (16 episodes)

as 코치 (6 episodes)

as Detective Park (32 episodes)

as Hwang Hyun-dong (16 episodes)

as Dr. Hwang (12 episodes)