Andy Lau
— Lee Rock
郭富城
— Bill Lee
Sharla Cheung
— Grace Pak
Chingmy Yau
— Rose
吳孟達
— Lardo
秦沛
— Sergeant Ngan Tung
田俊
— Silverfish
陳惠敏
— King Crab
韓坤
— Hau
Louis Roth
— Commissioner Alan
Wong Chi-Keung
— Detective Yang
陳龍
— Kirin / Fire Dragon
林華勳
— Rock's detective at station
張達明
— Ng Hak Ping
向華強
— Sergeant Lam Kong
熊欣欣
— Shrimp Head
John Wakefield
— Translator for Comm. Alan
藍靖
— Detective Tak
徐寶華
— Shrimp Head's Man
Jim James
— Police Officer
周潤堅
— Shrimp Head's Man
黃凱森
— Shrimp's Thug at Hospital