as An Do-gang(6 eps)
as Kim Yong-gyun(2 eps)
as Hyeong-gu
as Choi Dong-gyu(5 eps)
as Song Gi-ho(4 eps)
as Jung-ho
as Choi Su-ryong(10 eps)
as Kim Seung-cheol(1 ep)
as Young-hee's Father
as Choi Kyu-dong
as Oh Sung-bok
as Teacher
as Police Officer
as Young Ho
as Boeun Cop 1
as Shim-bok
as Fellow Detective
as Ham Radio Club 2