Prequel van Infernal Affairs. Wanneer agent Chen Wing Yan undercover gaat bij de Triads en Triad Lau Kin Ming, in opdracht van zijn baas Sam, bij de politie gaat, krijgen ze op een gegeven moment dezelfde vijand. De baas van een andere bende.
Nee, helaas is Infernal Affairs II nog niet beschikbaar op Netflix in Nederland.
| Directing | Alan Mak | Director |
| Production | Daniel Yun | Executive Producer |
| Sound | Chan Kwong-Wing | Original Music Composer |
| Directing | Andrew Lau Wai-Keung | Director |
| Editing | Danny Pang | Editor |
| Writing | Felix Chong | Screenplay |
| Production | Andrew Lau Wai-Keung | Producer |
| Production | John Chong | Executive Producer |
| Editing | Curran Pang | Editor |
| Writing | Alan Mak | Screenplay |
| Crew | Ng Man-Ching | Cinematography |
| Crew | Andrew Lau Wai-Keung | Cinematography |
| Art | Bill Lui Cho-Hung | Art Direction |
| Production | 黃斌 | Coordinating Producer |
