In the Line of Duty 4

Two detectives who are up to their necks in trouble and in each other's face, as they try to shut down a drug-trafficking scheme that could be connected with international ties to organized crime. But in the midst of their investigation, innocent immigrant dock worker Luk Wan-Ting gets caught up in the mix when he witnesses the murder of an intelligence operative and is framed for the crime.

Cynthia Khan

Insp Rachel Yeung Lai-Ching

Donnie Yen

Captain Donnie Yan

Michael Wong

Captain Michael Wong

Simon Yuen Yat-Choh

Luk Wan-Ting

Lisa Chiao Chiao

Luk's Mother

Wai Gei-Shun

HK Police Officer

Yuen Shun-Yi

Drug Dealer

Michael F. Woods

Black Fighter on Rooftop / Motorbike

John Paul Salvitti

Fighter in Alley

Stephen Berwick

Fighter on Motorbike

Fairlie Ruth Kordick

Blonde Fighter

Paul Wong Kwan

Killer at Hospital

Eddie Edvardo Maher

Loan Shark in Seattle

Liu Kai-Chi

Ming