Simon Yam as Capt. Wong Man Chin / Dog Head

Tony Leung Ka-Fai as Chan Chong-shan / Hollow Man

Kate Tsui Tsz-Shan as Peggy / Piggy / Constable Ho Ka Po

Maggie Siu Mei-Kei as Madam Fong

Lam Suet as Ng Tung / Fatman

Eddie Cheung Siu-Fai as Snr Insp. Chan

Jimmy Wong Wa-wo as Wo / IB cop

Lo Chung-Him as Snakie / SU agent

Berg Ng Ting-Yip as Shan's Gang Member

Wayne Lai Yiu-Cheung as Shan's Gang Member

Samuel Pang King-Chi as Shan's Gang Member

Frank Liu Zong-Ji as Shan's Gang Member

Chiu Chi-Shing as Shan's Gang Member

Chan Kung as Shan's Gang Member

Lau Kwok-Shing as Master

Susan Tse Suet-Sum as Master's Wife

Wong Siu-Foon as IB Policeman

Tam Kon-Chung as IB Policeman (uncredited)

Hung Wai-Leung as Kidnapper

Au Hin-Wai as

Johnny Wong Yin-Ming as Man Eating in 7-Eleven (uncredited)

Cheung Wing-Cheung as Loan Shark (uncredited)

Sherwin Ming Tak-Fung as Sergeant Wong

Apple Chow Suk-Wai as

Lee Long-Ming as