Nick Cheung Ka-fai

Blue

Louis Koo

Shiu Chi-Long

Francis Ng Chun-yu

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 Sung-min

Assassin

Li Guangjie

Tung Pak-Ho

Zhang Huiwen

Siu Ying, Blue's Bodyguard

Xing Yu

Sniper

Cheng Taishen

Kwok Ming