Infernal Affairs

1h 41m · 2002 · Directed by Alan Mak Siu-Fai · 4.1 / 5 on Letterboxd

Infernal Affairs (2002) runs 1h 41m, directed by Alan Mak Siu-Fai. It is one of 3,647 films in the 100 Minute Movies catalog — every one rated 3.0 or higher by Letterboxd members and short enough to finish in an evening.

Chan Wing Yan, a young police officer, has been sent undercover as a mole in the local mafia. Lau Kin Ming, a young mafia member, infiltrates the police force. Years later, their older counterparts, Chen Wing Yan and Inspector Lau Kin Ming, respectively, race against time to expose the mole within their midst.

Genres: Drama, Thriller, Crime

Where to watch: HBO Max (US, checked 9 July 2026)