In the vast landscape of international cinema, few films leave a scar on the viewer’s psyche quite like Kim Jee-woon’s 2010 masterpiece, I Saw the Devil ( Ang-ma-reul bo-at-da ). Starring Lee Byung-hun and Choi Min-sik (famous for Oldboy ), this South Korean revenge thriller is relentless, brutal, and emotionally draining. It is considered a gold standard of the genre—a 144-minute cat-and-mouse game that questions the very nature of justice and monstrosity.