Infernal Affairs (2002)

A story between a mole in the police department and an undercover cop. Their objectives are the same: to find out who is the mole, and who is the cop.

Director:

Cast: Andy Lau, Tony Leung Chiu-wai, Anthony Chau-Sang Wong, Eric Tsang, Kelly Chen, Sammi Cheng, Edison Chen, Shawn Yue, Elva Hsiao, Chapman To, Ka-Tung Lam, Ting Yip Ng, Dion Lam, Chi-Keung Wan, Hui Kam Fung, Tony Ho, Courtney Wu, Hin-Wai Au