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 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

(Assassin)

Li Guangjie

(Tung Pak-Ho)

Zhang Huiwen

(Siu Ying, Blue's Bodyguard)

Xing Yu

(Sniper)

Cheng Taishen

(Kwok Ming)

Lo Hoi-pang

(Triad Member)

Bob Lam Shing-Ban

(Ferrari Owner)

Timothy Cheng Chi-sing

(Lam Tung Yau)

Jade Leung Tsang

(Karina)

Jimmy Au Shui-wai

(Hong Sir)

Rebecca Zhu Chenli

(Samantha, CIB Detective)

Stefan Wong

(CIB Detective)

Grace Wong

(CIB Detective)

Hugo Wong Tsz-Hang

(Shiu Chi-Long's Subordinate)

Océane Zhu

(CIB Detective)

William Chak

(Ng Pak)

Sammi Cheung

(CIB Detective)

Choi Kwok-hing

(Triad Member)

Ken Law Ho-ming

(Lam Bok-Man's Bodyguard)

Jerry Leung Ho-Kai

(Lam Bok-Man's Bodyguard)

Ben Yuen Foo-wah

(Triad Member)

Alice Fung So-bor

(Auntie Mui)

Michael Wai Chi-Ho

(Cocktail MC)

Cheung Lap-Fung

(Assassin in Sauna)

Keira Wang

(Mandy)

Fung Hong-Ling

(Banker)

Leo Lai Yat-Nam

(Restaurant Manager)

Kevin Tong

(Peter, IT Manager)

Carlos Koo

(Bank Client)

Benjamin Wong Chi-Kong

(Ma Sir)

Vernon Fong

(Interrogation Room Policeman)

Ho Chun-Hin

(Interrogation Room Policeman)

Xavier Leung Kwok-Kin

(Shiu Chi-Long's Thug)

Sunny Chow

(Chum Foon Hei's Thug)

Kwing Lam Ka-wing

(Chum Foon Hei's Thug)

Lau Tin-Lung

(CIB)

Terrence Huang

(CIB)

Chan Kwok-Fung

(CIB)

Maggie Yu

(CIB)

Dickson Wong Tak-Sang

(CIB)

Jones Lee Chung Hei

(Triad Member)

Alex To Kong

(Triad Member)

Julius Brian Siswojo

(Triad Member)

Phat Chan

(Triad Member)

Edward Chui Wai-Tung

(Triad Member)

Andy Wong Chi-Man

(Lam Tung Yau's Bodyguard)

Che Kim-fai

(Lam Tung Yau's Bodyguard)

Jason Wong

(Kwok Ming's Thug)

Jacky Lei

(Kwok Ming's Thug)

Ronald Lam Tsz-kit

(Surveillance Room Policeman)

Derek Lam Ling-yuen

(Tung Pak-Ho's Thug)

Woo Man-Jun

(Tung Pak-Ho's Thug)

Emil Chan Cheuk-wah

(Ng Pak's Thug)

Jordon Ho

(Police Inspector)

David Yu Tat-Chi

(Police Inspector)

Mark Lam Wing-Chung

(Police Inspector)

Chan Ying-Kit

(Police Inspector)

Akai Lee

(Kwong Ming Lawyer)

Cheung Wing-Kai

(OTCB Officer)

Ng Chi-Wai

(OTCB Officer)

Kwong Yuk-Chung

(OTCB Officer)

Law Yim-Cheong

(OTCB Officer)

Jorge Lucas

(Drug Lord)

Aires Jorge Ramos

(Driver)

Yiu Man-Kei

(Ding's Police Guard)

Tommy Leung Pok-Yan

(Ding's Police Guard)

Wong Wai-Tong

(Hitman)

Kong Fu-Keung

(Hitman)

Cheung Ping-Chuen

(Hitman)

Paco Yick Tin-hung

(Hitman)

Kris Li Chun-Pan

MJ Chan