Mad Detective (2007) - Cast

Ching Wan Lau as Inspector Chan Kwai Bun (as Lau Ching Wan)
Andy On as Inspector Ho Ka On
Ka Tung Lam as Ko Chi Wai (as Lam Ka Tung)
Kelly Lin as May Cheung
Kwok-Lun Lee as Wong Kwok Chu (as Lee Kwok Lun)
Choi-ning Lee as Gigi (as Karen Lee)
Flora Chan as May Cheung - in Bun's eyes
Siu-Fai Cheung as Violent Man - Ko's Inner Personality (as Cheung Siu Fai)
Suet Lam as Fatso - Ko's Inner Personality (as Lam Suet)
Jay Lau as Calculating Woman - Ko's Inner Personality (as Lau Kam Ling)
Eddy Ko as The Chief
Jo Kuk as Cunning Woman - Ho's Inner Personality (as Jo Koo)
Ling To Yuen as (as Yuen Ling To)
Jonathan Lee as Weak Boy - Ho's Inner Personality