Line Walker

張家輝

Blue

Louis Koo Tin-Lok

Shiu Chi-Long

Francis Ng

Q-Sir / Inspector Q

佘詩曼

Ding Siu-Ka

許紹雄

Foon Hei-Gor

陳豪

Police Superintendent

張繼聰

Triad Member

Clara Lee

Assassin

李光洁

Tung Pak-Ho

張慧雯

Siu Ying, Blue's Bodyguard

Xing Yu

Sniper

成泰燊

Kwok Ming

盧海鵬

Triad Member

Bob Lam Shing-Ban

Ferrari Owner

鄭子誠

Lam Tung Yau

梁琤

Karina

歐瑞偉

Hong Sir

朱晨麗

Samantha, CIB Detective

黃祥興

CIB Detective

王君馨

CIB Detective