I Saw the Devil

Abandon all compassion.

Kyung-chul is a dangerous psychopath who kills for pleasure. Soo-hyeon, a top-secret agent, decides to track down the murderer himself. He promises himself that he will do everything in his power to take vengeance against the killer, even if it means that he must become a monster himself.

Jeon Kuk-hwan

Squad Chief Jang

Cheon Ho-jin

Section Chief Oh

Nam Bo-ra

Section Chief's Daughter

Lee Jun-hyuk

NIS Agent

Yoon Chae-yeong

Nurse Han Song-i

Choi Moo-sung

Tae-joo

Kim In-seo

Se-jung

Lee Byung-hun

Kim Soo-hyeon

Choi Min-sik

Kyung-chul

Kim Kap-soo

Planning Team Deputy Head

Um Tae-goo

Detective

Choi Jin-ho

Planning Director

Jeong Mi-nam

Gangster in Taxi

Oh San-ha

Joo-yeon

Jo Deok-jae

Detective Kang

Kim Yoon-seo

Se-yeon

Jang Jeong-won

Kyung-chul's Son

Park Seo-yeon

Woman at Pension