Bae Ki-beom

as Elderly Worker at Solar Paper

as Grandpa with an Earring

as Teacher Ko

as Kim Yong-ho (1 episode)

as Deputy Minister of the Interior

as Ahn Gyu-chul (3 episodes)

as Modern Hanbok

as Train passenger (2 episodes)

as Kim Chang-wan's uncle (1 episode)

as Satoru (1 episode)

as Yoo Jae-Ho [Doctor] (1 episode), as Yoo Jae Ho [Doctor] (1 episode)

as Upset diner (1 episode)

as Kim

as Who Joon’s Dad’s Friend (1 episode)

as Kim Jang-ho (1 episode)

as Jo Man Gi [Police Chief] (1 episode)

as Choi Sang Bae [Policy Advisor, Ministry of Defense] (3 episodes)