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 |
| Directing | Andrew Lau Wai-Keung | Director |
| Production | Andrew Lau Wai-Keung | Producer |
| Writing | Alan Mak | Screenplay |
| Camera | Lai Yiu-Fai | Director of Photography |
| Editing | Danny Pang Fat | Editor |
| Camera | Andrew Lau Wai-Keung | Director of Photography |
| Production | Ronald Wong | Production Manager |
| Editing | Curran Pang | Editor |
| Art | Choo Sung-Pong | Art Direction |
| Art | Wong Ching Ching | Art Direction |
| Costume & Make-Up | Lee Pik-Kwan | Costume Design |
| Costume & Make-Up | Cheng Yu-Lai | Makeup Artist |
| Costume & Make-Up | Lau Wai-Hing | Hairstylist |
| Visual Effects | Victor Wong Wang-Tat | Visual Effects Supervisor |
| Visual Effects | Eddy Wong Wang-Hin | Visual Effects Supervisor |
| Crew | Dion Lam Dik-On | Stunt Coordinator |
| Sound | Bernard Chin Wing-Lai | Sound Mixer |
| Sound | Felix Chung Sze-Ming | Music Editor |
| Sound | Felix Chung Sze-Ming | Sound Effects Editor |
| Sound | Kwong Wai-Hung | Foley Artist |
| Sound | George Lee Yiu-Keung | Dialogue Editor |
| Sound | George Lee Yiu-Keung | Sound Re-Recording Mixer |
| Sound | Kinson Tsang King-Cheung | Sound Re-Recording Mixer |
| Sound | Kinson Tsang King-Cheung | Sound Designer |
| Camera | Cho Man-Keung | Focus Puller |
| Camera | Ho Kin-Kwong | Focus Puller |
| Camera | Wing Chung Kwan | Focus Puller |
| Camera | Raymond Lam Fai-Tai | Steadicam Operator |
| Lighting | Wong Chi-Ming | Gaffer |
| Sound | Comfort Chan Kwong-Wing | Original Music Composer |
| Production | Ronald Wong | Producer |
