No Mercy— Full Cast

Sul Kyung-gu

as Kang Min-ho

Ryoo Seung-bum

as Lee Sung-ho

Han Hye-jin

as Min Seo-young

Sung Ji-ru

as Yun Jong-kang

Park Sang-wook

as Park Pyung-sik

Kim Jung-hak

as Prosecutor Park

Lee Jeong-heon

as Analyst

Ju Seok-tae

as Seo-young's Senior

Nam Kyung-eup

as Chief Detective Oh

Jo Soo-jung

as Oh Eun-ah

Jung Si Yeon

as Ah-ri

Kim Yeol

as Kang Hye-won

Lee Jeong-u

as Min Byeong-do

Ahn Ju-mi

as Young Kang Hye-won