갑동이

정인기

as Cha Do-hyeok

조민준

as Lee Hyung-nyeon

윤상현

as Ha Moo Yum

김민정

as Maria Oh

성동일

as Yang Cheol-gon

이준

as Ryu Tae-oh

김지원

as Ma Ji-wool

강남길

as Han Sang-hoon

민성욱

as Nam Ki Ri

윤균상

as Youngest detective

Choo Soo-hyun

as Oh Young-ae

윤찬영

as young Ryu Tae-oh

현우

as young Cha Do-hyeok

Jeong Jae Min

as Ha Moo Yum [Young]

하준

as Nah Do-Hyung