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