Seong So-min

as Mayor

as Manager

as Won Se-jong (Sang-hyeon's middle school classmate)

as Watchman at Seowon station

as Seungil

as General Myeongryun

as Filmmaker

as Senior Statesman 4

as Choi Moon-seon

as Kim Seok-deok (Youngsook's husband)

as Han Kim

as Retainer 1

as Yu

as Detective Choi

as Gyeong-bin

as Boss Yoon

as Head of the Detective Department (ep. 2)

as Kang Man-guk

as Kim Dong-hwan

as Mr. Hwang

as Village Head Chang Yu-Tang