Nick Cheung Ka-Fai

Blue

Louis Koo

Shiu Chi-Long

Francis Ng

Q-Sir / Inspector Q

Charmaine Sheh Sze-Man

Ding Siu-Ka

Benz Hui Siu-Hung

Foon Hei-Gor

Moses Chan Ho

Police Superintendent

Louis Cheung

Triad Member

Clara Lee

Assassin

Li Guangjie

Tung Pak-Ho

Zhang Huiwen

Siu Ying, Blue's Bodyguard

Xing Yu

Sniper

Cheng Taishen

Kwok Ming