Ra Mi-ran as Park Mi-young

Lee Sung-kyoung as Cho Ji-hye

Yoon Sang-hyun as Jo Ji-chul

Choi Soo-young as Yang Jang-mi

Yeom Hye-ran as Chief Civil Service Officer

Wi Ha-jun as Woo-jun

Joo Woo-jae as Philip

Kang Hong-suk as Yong-seok

Kim Do-wan as Chan-young

Jun Suk-ho as Detective Oh

Cho Byeong-kyu as Youngest Detective

Lee Jung-min as Chae Sook-hee

Ha Jung-woo as Motel Staff

Sung Dong-il as Hwang Bok-hyun

Lee Re as Young Ji-hye

Ahn Seong-bong as Big Man

Baek Seung-hwan as Police Chief

So Hee-jung as Se-jin's Mother

Kim Min-kyung as Youth Division Detective

Jo Hye-joo as Soo-bin

Jack Lyons as JD the Tatooist

Anupam Tripathi as Arabian Subordinate

Choi Byung-yoon as Club Staff

Im Ye-eun as High School Student

Ahn Chang-hwan as Kang Sang-doo

Choi Hye-jin as Back Street Nostalgic Girl

Han Soo-hyun as Detective Kwak

Kim Han-sang as Past Citation Moderator

Park Se-jin as Girl Cop

Lim Hyun-sung as Cyber Investigations Police

Park So-eun as Seo-jin

Chris Lyon as Carmelo

Seo Suk-kyu as Truck Driver in Accident

Ahn Jae-hong as Happy Balloons Boss

Kim Jun as Chan-woong

Seol Chang-hee as Seo-jin's Doctor

Kim Tae-jun as Criminal Affairs Division Civil Petitioner

Bae Yoo-ram as Helium Balloon High Schooler

Ok Ja-yeon as New Pacific Suicide Female Victim

Kim Min-kyung as Woman & Youth Division Detective

Jeong Doo-won as Flirty Man at Club

Kim Gwang-seop as Shinchon Sunglasses Man

Kim Chul-hwan as Helium Balloon High Schooler

Kim Ji-na as Former Female Taskforce

Song Ji-hyuk as Happy Balloon University Student

Lee Moon-bin as Guardhouse Conscripted Policeman

Gambhir Man Shrestha as Arab Owner of Big-sized Clothes Store