Line Walker

The details of undercover police officers are deleted from a police database and a senior officer is left struggling to know who are the undercover officers and who are the criminals.

Action Crime Drama

Nick Cheung Ka-Fai

(Blue)

Louis Koo

(Shiu Chi-Long)

Francis Ng

(Q sir/Inspector Q)

Charmaine Sheh

(Ding Siu-Ka)

Hui Shiu-Hung

(Foon Hei-Gor)

Li Guangjie

(Tung Pak-Ho)

Zhang Huiwen

(Siu Ying)

Xing Yu

(sniper / assassin)

Cheng Taishen

(Kwok Ming)

Moses Chan

(Police superintendent)

Louis Cheung

(Guy blocking Blue at meeting)

Clara Lee

(Assassin)

Ben Yuen Foo-Wah

(Uncle Heen)

Choi Kwok-Hing

(Master Fung)

Jade Leung Chang

(Karina)

Rebecca Zhu

(Samantha, CIB detective)

Jimmy Au Shui-Wai

(Hong Sir)

Timothy Cheng Chi-Sing

(Lin Dongyou)

Jason Wong

(Kwok Ming's thug)

Phat Chan Fei

Lo Hoi-pang

MJ Chan

Bob Lam

Paco Yick Tin-Hung

Ken Law Ho-Ming

Andy Wong Chi-Man

Alice Fung So-Po