Andy Lau

as Lee Rock

Aaron Kwok Fu-Shing

as Bill Lee

Sharla Cheung

as Grace Pak

Chingmy Yau Suk-Ching

as Rose

Richard 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