| Person | Type | Job | Role(s) |
|---|---|---|---|
 Charles Heung | Crew | Production | Executive Producer |
 Johnnie To | Crew | Directing | Director, Producer |
 Wai Ka-fai | Crew | Directing | Director, Screenplay, Producer |
 Cheng Siu-keung | Crew | Camera | Director of Photography |
 Stanley Cheung | Crew | Costume & Make-Up | Costume Design |
Tina Baz | Crew | Editing | Editor |
Xavier Jamaux | Crew | Sound | Original Music Composer |
Raymond Chan | Crew | Art | Art Direction, Production Design |
 Au Kin-yee | Crew | Writing | Screenplay |
 Kuk Kok-Leung | Crew | Production | Line Producer |
 Chiu Chi-Shing | Crew | Production | Unit Manager |
Midco Chu Wai-Fong | Crew | Costume & Make-Up | Makeup Artist |
Martin Richard Chappell | Crew | Sound | Sound Designer |
Mark Garbarino | Crew | Costume & Make-Up | Makeup Artist |
 Andy On | Cast | Actor | Inspector Ho Ka-on |
 Lau Ching-wan | Cast | Actor | Inspector Chan Kwai Bun |
 Eddy Ko | Cast | Actor | The Chief |
 Flora Chan | Cast | Actress | May Cheung in Bun's Eyes |
 Jay Lau | Cast | Actress | Calculating Woman - Ko's Inner Personality |
 Jo Kuk Cho-Lam | Cast | Actress | Ho Ka-on's Inner Personality |
 Lam Ka-tung | Cast | Actor | Ko Chi Wai |
 Kelly Lin | Cast | Actress | May Cheung |
 Lee Kwok-Lun | Cast | Actor | Wong Kwok Chu |
 Eddie Cheung | Cast | Actor | Violent Man - Ko's Inner Personality |
 Lam Suet | Cast | Actor | Fatso - Ko's Inner Personality |
Yuen Ling-To | Cast | Actor | Policeman |
 Soi Cheang | Cast | Actor | Inspector Ho Ka-on (voice) |
 Karen Lee Choi-Ling | Cast | Actress | Gigi |
 Jonathan Lee Yat-Sing | Cast | Actor | Weak Boy - Ho's Inner Personality |
 Ronald Yan Mau-Keung | Cast | Actor | Chi-Wai's Boss |
 Singh Hartihan Bitto | Cast | Actor | Naresh Sharma |
 Lui Siu-Ming | Cast | Actor | Mahjong Parlour's Staff (uncredited) |
 Jimmy Wong Wa-Wo | Cast | Actor | Restaurant Manager |
 Florence Kwok | Cast | Actress | May Cheung (voice) |
Chiu Chi-Shing | Cast | Actor | Ko's Inner Personality |
Hung Wai-Leung | Cast | Ko's Inner Personality | |
Mark Cheung Yiu-Fai | Cast | Actor | Mahjong Parlour Customer (uncredited) |
Lu Ching-Ting | Cast | Ko's Inner Personality | |
Jeff Cheung Ka-Kit | Cast | Ko's Inner Personality | |
 Wong Shiu-Keung | Cast | Policeman (uncredited) | |
Jack Lai | Cast | Actor | Ko's Colleague |
Apple Chow Suk-Wai | Cast | Actress | 7-11 Worker |
Jackson Ha Chak-Shun | Cast | Actor | Ko's Colleague |
| Person | Type | Job | Role(s) |
