강석원

Investigator (Eps 5)

Detective

Seung-gil

Gear complainant

Senior Detective

Head of Department Kang

Teacher Suk-won

Seung-won's Co-worker

Male Talk Show Guest

[Babel Chemicals team leader]

Choir Member

Care Worker

Do-bin

Taxi Driver

Reporter 4

Machinery Team Leader

Hyung-joon

Prisoner 1

Behavior Examiner

Cameraman

Squad Member

Fellow Detective

Taekwondo Team Coach

Gangneung Police 3

police officer

Situation room agent