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.
Unfortunately the movie Infernal Affairs is not yet available on HBO Max.
| Directing | Alan Mak | Director |
| Writing | Felix Chong | Screenplay |
| Writing | Alan Mak | Screenplay |
| Editing | Danny Pang Fat | Editor |
| Camera | Lai Yiu-Fai | Director of Photography |
| Production | Andrew Lau Wai-Keung | Producer |
| Directing | Andrew Lau Wai-Keung | Director |
| Camera | Andrew Lau Wai-Keung | Director of Photography |
| Production | Ronald Wong | Production Manager |
| Camera | Raymond Lam Fai-Tai | Steadicam Operator |
| Sound | Felix Chung Sze-Ming | Sound Effects Editor |
| Visual Effects | Eddy Wong Wang-Hin | Visual Effects Supervisor |
| Costume & Make-Up | Cheng Yu-Lai | Makeup Artist |
| Sound | Felix Chung Sze-Ming | Music Editor |
| Sound | Kinson Tsang King-Cheung | Sound Re-Recording Mixer |
| Sound | Kinson Tsang King-Cheung | Sound Designer |
| Lighting | Wong Chi-Ming | Gaffer |
| Camera | Wing Chung Kwan | Focus Puller |
| Sound | George Lee Yiu-Keung | Sound Re-Recording Mixer |
| Editing | Curran Pang | Editor |
| Art | Choo Sung-Pong | Art Direction |
| Sound | Kwong Wai-Hung | Foley Artist |
| Camera | Cho Man-Keung | Focus Puller |
| Camera | Ho Kin-Kwong | Focus Puller |
| Visual Effects | Victor Wong Wang-Tat | Visual Effects Supervisor |
| Sound | Bernard Chin Wing-Lai | Sound Mixer |
| Crew | Dion Lam Dik-On | Stunt Coordinator |
| Sound | George Lee Yiu-Keung | Dialogue Editor |
| Art | Wong Ching Ching | Art Direction |
| Costume & Make-Up | Lee Pik-Kwan | Costume Design |
| Costume & Make-Up | Lau Wai-Hing | Hairstylist |
| Sound | Chan Kwong-Wing | Original Music Composer |
