Choi Young-woo

as Chief secretary (3 episodes)

as Wang Bal-tong

as Ingguldai (21 episodes)

as Hwang Yong-tae (12 episodes)

as Baek Dong-sik (16 episodes)

as Lee Ki-soo (8 episodes)

as Park Seung Seon (16 episodes)

as Lee Tae‑seop (4 episodes)

as Young-choon

as Cheon Myeong-tae (24 episodes)

as Police Lieutenant

as Sailor from Jemulpo (2 episodes)

as Prison guard Lee Jeong-jae (4 episodes)

as Broker

as Forensic team member #1