Park Mi-young

Ra Mi-ran

Cho Ji-hye

Lee Sung-kyung

Chae Sook-hee

Lee Jung-min

Youth Division Detective / Woman & Youth Division Detective

Kim Min-kyung

Jo Ji-chul

Yoon Sang-hyun

Yang Jang-mi

Choi Soo-young

JD the Tatooist

Jack Lyons

Yang Jang-mi

Sooyoung Choi

Woo-joon

Wi Ha-joon

Chief Civil Service Officer

Yeom Hye-ran

Club Staff

Choi Byung-yoon

Phillip

Joo Woo-jae

Back Street Nostalgic Girl

Choi Hye-jin

Department head

Eom Hye-ran

Past Citation Moderator

Kim Han-sang

Youngest detective

Jo Byung-gyu

Seo-jin

Park So-eun

Yong-seok

Kang Hong-suk

Chan-young

Kim Do-wan

Detective Oh

Jeon Seok-ho

Carmelo

Chris Lyon

Chan-woong

Kim Jun

Detective Oh

Jun Seok-ho

Yong-suk

Kang Hong-seok

Youngest Detective

Cho Byeong-kyu

Criminal Affairs Division Civil Petitioner

Kim Tae-jun

Shinchon Sunglasses Man

Kim Gwang-seop

Motel desk clerk

Ha Jung-woo

Helium Balloon High Schooler

Kim Chul-hwan

Chief of felony crime squad

Sung Dong-il

Happy Balloons Boss

Ahn Jae-hong

Former Female Taskforce

Kim Ji-na

Young Ji-hye

Lee Re

Happy Balloon University Student

Song Ji-hyuk

Big Man

Ahn Seong-bong

Seo-jin's mother

So Hee-jung

Guardhouse Conscripted Policeman

Lee Moon-bin

Police chief (past)

Baek Seung-hwan

Arab Owner of Big-sized Clothes Store

Gambhir Man Shrestha

Soo-bin

Jo Hye-joo

Arabian Subordinate

Anupam Tripathi

High School Student

Limm Yea-eun

Kang Sang-doo

Ahn Chang-hwan

Back Street Nostalgic Girl

Choe Hye-jin

Detective Kwak

Han Soo-hyun

Girl Cop

Park Se-jin

Cyber Investigations Police

Lim Hyun-sung

Truck Driver in Accident

Seo Suk-kyu

Seo-jin's Doctor

Seol Chang-hee

Helium Balloon High Schooler

Bae Yu-ram

New Pacific Suicide Female Victim

Ok Ja-yeon

Flirty Man at Club

Jeong Doo-won

New Pacific Taxi Driver

Kang Shin-ha

Transportation Manager

Lee Ui-soo