Jeon Kwang-jin

as Homeroom Teacher (1 episode)

as Park Jun-tae (2 episodes)

as Oh Man-soo's Son (2 episodes)

as Choi Jin-tae (12 episodes)

as Lawyer Choi Young-jae (2 episodes)

as [Bomb squad captain] (1 episode)

as Seo Young-bin (2 episodes)

as Suk-hoon (2 episodes)

as Police Officer

as Detective Jang Jin-ho (4 episodes)

as Detective

as Choi Deok-Ho (32 episodes)

as Jong Se-hyeok (24 episodes)

as Reporter

as Public Security Elite Agent (Namsan Tower)

as Detective

as Sky Lounge Customer

as Detective

as Law Enforcement Officer

as Detective

as Law Enforcement Officer