Andy Lau as Lee Rock

Aaron Kwok as Bill Lee

Sharla Cheung as Grace Pak

Chingmy Yau as Rose

Ng Man-Tat as Lardo

Paul Chun Pui as Sergeant Ngan Tung

James Tien Chun as Silverfish

Michael Chan Wai-Man as King Crab

Victor Hon Kwan as Hau

Louis Roth as Commissioner Alan

Wong Chi-Keung as Detective Yang

Peter Chan Lung as Kirin / Fire Dragon

Jameson Lam Wa-Fan as Rock's detective at station

Cheung Tat-Ming as Ng Hak Ping

Charles Heung as Sergeant Lam Kong

Xiong Xinxin as Shrimp Head

John Wakefield as Translator for Comm. Alan

Dave Lam Ching as Detective Tak

Ridley Tsui Bo-Wah as Shrimp Head's Man

Jim James as Police Officer

Danny Chow Yun-Kin as Shrimp Head's Man

Huang Kaisen as Shrimp's Thug at Hospital