Lee Seol-gu

as Detective Yang

as Moon Je Jeok (6 episodes)

as Choi

as Lee Tae-sik

as Beom-teol

as Sect 1 Leader

as [Drunk client] (1 episode)

as North Korean Defector

as Chang-soo

as President

as Teacher Kim

as Detective Kim (김형사)

as Client - Special appearance (클라이언트)

as Slave

as Gangster in Taxi

as Sam-gook's Gang