Infernal Affairs
Directed by Wai-Keung Lau and Alan Mak...
Directed by Wai-Keung Lau and Alan Mak and later remade as The Departed by Martin Scorcese, this Hong Kong crime-thriller follows an undercover cop (Tony Chiu Wai Leung) and a triad member (Andy Lau) working as a police department mole.