Detective Park

Homeroom teacher

Mr. Park

Sang Hun [Convenience Store Owner from North Korea]

Jung Jae Min

Park Dong Chan

Detective Ki-won

Jung Hyun-wo Dad (Eps 1, 2)

Detective Jung

Chung Yu Cheol

Detective Song

[Detective]

Obese

Mr. Kim

Jeong Du-man (Detective)

Kim Yoo-Chul [Detective]

Ki Dong Su

Patient's Son

Kim Myeong-bae

[Sangdo Express Union member]

[Gambling House Manager]

Detective Go [Police detective]

Detective Go