Sean Lau Ching-Wan

Character: Inspector Chan Kwai Bun

Andy On Chi-Kit

Character: Inspector Ho Ka-on

Gordon Lam Ka-Tung

Character: Ko Chi Wai

Kelly Lin Hsi-Lei

Character: May Cheung

Karen Lee Choi-Ling

Character: Gigi

Joseph Lee Kwok-Lun

Character: Wong Kwok Chu

Eddie Cheung Siu-Fai

Character: Violent Man - Ko's Inner Personality

Lam Suet

Character: Fatso - Ko's Inner Personality

Jay Lau Kam-Ling

Character: Calculating Woman - Ko's Inner Personality

Jeff Cheung Ka-Kit

Character: Ko's Inner Personality

Lu Ching-Ting

Character: Ko's Inner Personality

Chiu Chi-Shing

Character: Ko's Inner Personality

Hung Wai-Leung

Character: Ko's Inner Personality

Flora Chan Wai-Shan

Character: May Cheung in Bun's Eyes

Jonathan Lee Yat-Sing

Character: Weak Boy - Ho's Inner Personality

Jo Kok Cho-Lam

Character: Schemy Woman - Ho's Inner Personality

Eddy Ko Hung

Character: The Chief

Yuen Ling-To

Character: Policeman

Jimmy Wong

Character: Restaurant Manager

Ronald Yan Mau-Keung

Character: Chi-Wai's Boss

Apple Chow Suk-Wai

Character: 7-11 Worker

Jackson Ha Chak-Shun

Character: Ko's Colleague

Jack Lai

Character: Ko's Colleague

Singh Hartihan Bitto

Character: Naresh Sharma

Wong Shiu-Keung

Character: Policeman (uncredited)

Lui Siu-Ming

Character: Mahjong Parlour's Staff (uncredited)

Mark Cheung Yiu-Fai

Character: Mahjong Parlour Customer (uncredited)

Soi Cheang

Character: Inspector Ho Ka-on (voice)

Florence Kwok Siu-Wan

Character: May Cheung (voice)

Peter Chan Bei-Dak

Character: Cameo (picture in police file)