任達華

Sergeant Wong Man-Chin / Dog Head

梁家輝

Chan Chong-Shan / Hollow Man

徐子珊

Constable Ho Ka-Po / Piggy

林雪

Ng Tung / Fatman

邵美琪

Madam Fong

張兆輝

Chief Inspector Chan

吳廷燁

Chan Chong-Shan's Gang Member

黎耀祥

Chan Chong-Shan's Gang Member

彭敬慈

Chan Chong-Shan's Gang Member

謝雪心

Master's Wife

劉國誠

Master

黃素歡

IB Policeman

區軒偉

Senior Police Officer

羅子溢

Snakie

劉宗基

Chan Chong-Shan's Gang Member

黃華和

Officer Wo

趙志誠

Chan Chong-Shan's Gang Member

洪偉良

Kidnapper

譚幹聰

IB Policeman (uncredited)

張榮祥

Loan Shark (uncredited)

明德豐

Sergeant Wong's Subordinate (uncredited)

李浪鳴

Surveillance Unit Operator (uncredited)