Infernal Affairs

Infernal Affairs follows two men on opposite sides of Hong Kong's criminal underworld who have each been planted in the other's world. Lau Kin-ming is a gang member who joined the police force on the orders of a triad boss and has risen through its ranks, while Chan Wing-yan is an officer who has spent years undercover inside the same criminal organisation, building a record that makes him look like a career criminal. Both become trapped in the identities they must maintain, and as suspicion of a mole grows on each side, they are set on a collision course.

Andrew Lau Wai-Keung directed, working with co-director Alan Mak, who also wrote the screenplay with Felix Chong Man-keung; the film is the thirteenth of twenty-five features Lau has directed, following The Avenging Fist and preceding Infernal Affairs II. Andy Lau and Tony Leung Chiu-wai lead the cast as the two moles, with Anthony Wong, Eric Tsang, Kelly Chen and Sammi Cheng in supporting roles.

Made for about six million dollars and released in December 2002, the film returned roughly nine million worldwide. On IMDb it holds 6.4 out of 10 from around 1,900 votes, while on TMDB it stands at 7.8 from a similar number, and critics rated it 7.5 from sixty-eight reviews.