Kim Do-yoon

as Yun Byeong Su [Detective] (14 episodes)

as Song U (8 episodes)

as Choi Yoon-seok

as Jo Yong-ho (8 episodes)

as Kang San-goon (9 episodes)

as Do-gyun

as Cha Mu-tae (16 episodes)

as Sergeant Ko Chul-min (4 episodes)

as Charlie (12 episodes)

as Jeong Jae-hoon (1 episode)

as Gi-hoon [Tunnel]

as Arrowhead Streamer / Lee Dong-wook (6 episodes)

as Kang Pil-seung (2 episodes)

as Do Maeng-soo

as Chul-min

as Yang Jin Soo [Homicide Detective] (12 episodes)

as Law firm employee (1 episode)

as Tattoo Man

as Kang Jin Goo (32 episodes)

as Se Gul / Hong (30 episodes)

as Yang Yi-sam

as Police Officer in Plain Clothes