Ra Mi-ran

Park Mi-young

Lee Sung-kyung

Cho Ji-hye

Yoon Sang-hyun

Jo Ji-chul

Sooyoung Choi

Yang Jang-mi

Yeom Hye-ran

Chief Civil Service Officer

Wi Ha-jun

Woo-jun

Joo Woo-jae

Philip

Kang Hong-suk

Yong-seok

Kim Do-wan

Chan-young

Jun Suk-ho

Detective Oh

Cho Byeong-kyu

Youngest Detective

Lee Jung-min

Chae Sook-hee

Ha Jung-woo

Motel Staff

Sung Dong-il

Hwang Bok-hyun

Lee Re

Young Ji-hye

Ahn Seong-bong

Big Man

Baek Seung-hwan

Police Chief

So Hee-jung

Se-jin's Mother

Kim Min-kyung

Youth Division Detective

Jo Hye-joo

Soo-bin

Jack Lyons

JD the Tatooist

Anupam Tripathi

Arabian Subordinate

Choi Byung-yoon

Club Staff

Limm Yea-eun

High School Student

Ahn Chang-hwan

Kang Sang-doo

Choi Hye-jin

Back Street Nostalgic Girl

Han Soo-hyun

Detective Kwak

Kim Han-sang

Past Citation Moderator

Park Se-jin

Girl Cop

Lim Hyun-sung

Cyber Investigations Police

Park So-eun

Seo-jin

Chris Lyon

Carmelo

Seo Suk-kyu

Truck Driver in Accident

Ahn Jae-hong

Happy Balloons Boss

Kim Jun

Chan-woong

Seol Chang-hee

Seo-jin's Doctor

Kim Tae-jun

Criminal Affairs Division Civil Petitioner

Bae Yu-ram

Helium Balloon High Schooler

Ok Ja-yeon

New Pacific Suicide Female Victim

Jeong Doo-won

Flirty Man at Club

Kim Gwang-seop

Shinchon Sunglasses Man

Kim Chul-hwan

Helium Balloon High Schooler

Kim Ji-na

Former Female Taskforce

Song Ji-hyuk

Happy Balloon University Student

Lee Moon-bin

Guardhouse Conscripted Policeman

Gambhir Man Shrestha

Arab Owner of Big-sized Clothes Store

Im Hyeon-cheol

Water Purifier Conscripted Policeman