A Killer Paradox

Choi Woo-shik

Lee Tang

Son Suk-ku

Jang Nan-gam

Lee Hee-jun

Song Chon

Han Sang-kyung

Hard-hitting

Lee Joo-young

Kyeong-ah's mother

남진복

?

Hyun Bong-sik

Park Bok-joon

Kim Yo-han

Nobin

Kwon Da-ham

Ahn Yong-jae

Oh Min-ae

Lee Tang's mother

Kim Min-ju

Lee Young

Heo Seon-haeng

Lee Tang's father

Park Ji-han

Jung Gang-hyo

Jung Yi-seo

Sun Yeo-ok

Yang Mal-bok

Shin Jung-hee

Jung Hoe-ryn

Eun-seon

최선우

Gyeong-hwan

Baek Yu-sung

Lee Jin-seong

Seo Jae-kwon

Kang Jae-joon

박경근

Chief of crime department

Oh Woo-ri

Mi-young

Lee Ji-hoon

Moon Myeong-jun

Oh Hye-won

Lee Yoo-jung

Lee Sang-won

Detective Kim

Jang Ji-an

Jang Nan-gam (young)

Kang Jee-seok

Jang Nan-gam (teen)

Lee Ju-won

Jang Gap-soo

Jo Hyun-wu

Yeo Boo-il

문영동

Lee Gwang-hoon

최미금

Club senior

Kim Keum-soon

Gwang-hoon's wife

장선

Jae-soon

Lee So-won

Kang Yeon-seo

Lee Joong-ok

Kang Sang-mook

Joo In-young

Kang Jae-joon's mother

고도하

Delivery man

임세주

Choi Gyeong-ah

Song Hyeong-su

Noh Eui-cheol

Roh Jae-won

Ha Sang-min

Han Yoon-ji

Hyeon-ji

Gun Woo

Choi Gyeong-ah's ex-boyfriend

장준휘

Team leader

Han Ji-an

Hyeong Ji-soo

Seung Eui-yeol

Hyeong Jung-guk

Jang Ui-don

Congressman