Infernal Affairs
A young gangster is assigned by a crime boss to enter the police academy, and a young academy graduate is spun off from the force and assigned to undercover work as a criminal. In each case, the strategy is to leave them in place for years, doing their jobs as well as possible, so they can rise in the ranks and become invaluable as moles.
Starring
Tony Leung Chiu-Wai, Andy Lau, Anthony Wong Yiu-Ming
Director
Andrew Lau Wai-Keung, Alan Mak