No Mercy

Sul Kyung-gu

Kang Min-ho

Ryoo Seung-bum

Lee Sung-ho

Han Hye-jin

Min Seo-young

Sung Ji-ru

Yun Jong-kang

Park Sang-wook

Park Pyung-sik

Kim Jung-hak

Prosecutor Park

Lee Jeong-heon

Analyst

Nam Kyung-eup

Chief Detective Oh

Jo Soo-jung

Oh Eun-ah

Jung Si-yeon

Ah-ri

Kim Yeol

Kang Hye-won

Lee Jeong-u

Min Byeong-do

Ahn Ju-mi

Young Kang Hye-won

Jo Yong-jae

Detective

Kwon Hyeok-pung

Sung-ho's father

Ju Seok-tae

Seo-young's Senior

Lee Jae-gu

Ready-mix concrete

Kim Hong-pa

Villager

Jung Hyung-suk

Professor

Joo Sang-wook

Lawyer