as Doo-young's uncle
as Chief secretary(3 eps)
as Wang Bal-tong
as Ingguldai(21 eps)
as Hwang Yong-tae(12 eps)
as Baek Dong-sik(16 eps)
as Lee Ki-soo(8 eps)
as Park Seung Seon(16 eps)
as Lee Tae‑seop(4 eps)
as Young-choon
as Cheon Myeong-tae(24 eps)
as Police Lieutenant
as Sailor from Jemulpo(2 eps)
as Prison guard Lee Jeong-jae(4 eps)
as Broker
as Forensic team member #1