Mad Detective

Lau Ching-Wan

Inspector Chan Kwai Bun

Andy On Chi-Kit

Inspector Ho Ka-on

Gordon Lam Ka-Tung

Ko Chi Wai

Kelly Lin Hsi-Lei

May Cheung

Karen Lee Choi-Ling

Gigi

Joseph Lee Kwok-Lun

Wong Kwok Chu

Eddie Cheung Siu-Fai

Violent Man - Ko's Inner Personality

Lam Suet

Fatso - Ko's Inner Personality

Jay Lau Kam-Ling

Calculating Woman - Ko's Inner Personality

Jeff Cheung Ka-Kit

Ko's Inner Personality

Lu Ching-Ting

Ko's Inner Personality

Chiu Chi-Shing

Ko's Inner Personality

Hung Wai-Leung

Ko's Inner Personality

Flora Chan Wai-Shan

May Cheung in Bun's Eyes

Jonathan Lee Yat-Sing

Weak Boy - Ho's Inner Personality