Kim Hong-pa

as Kwon Se-myeong (7 episodes)

as Kim Tae-jun (2 episodes)

as Moon Oh-sung

as Yook-nam

as Jeong Jae-geol (14 episodes)

as Seo Gil-pyo (12 episodes)

as Jang Il-joon (10 episodes)

as Ju Seong-jik

as Seo Chang-seok (16 episodes)

as Kim Guk-hwan

as Myung In Joo (12 episodes)

as Min Seok-joon (8 episodes)

as Director Seo

as Seo Gwang-su (16 episodes)

as Park Sang-beom (8 episodes)

as Director Seo

as [Caretaker] (8 episodes)

as Keeper

as Bureau Director Bae Guk-jang

as Ambassador Yun

as Byeon Sung-joo (16 episodes)

as Jo Dong-jin (16 episodes)

as Mr. Jang

as Jo Gap-Young (20 episodes)

as Jo Jin-Cheol (32 episodes)