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.

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  Yuen Woo-Ping

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  Cynthia Khan
  Insp Rachel Yeung Lai-Ching
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  Donnie Yen
  Captain Donnie Yan
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  Michael Wong
  Captain Michael Wong
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  Yuen Yat-Choh
  Luk Wan-Ting
• 
  Lisa Chiao Chiao
  Luk's Mother
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  Wai Gei-Shun
  HK Police Officer
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  Yuen Shun-Yi
  Drug Dealer
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  Michael Woods
  Black Fighter on Rooftop / Motorbike
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  John Salvitti
  Fighter in Alley
• 
  Stephan Berwick
  Fighter on Motorbike
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  Fairlie Ruth Kordick
  Blonde Fighter
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  Paul Wong Kwan
  Killer at Hospital
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  Eddie Maher
  Loan Shark in Seattle
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  Liu Kai-Chi
  Ming
• 
  Paco Yick Tin-Hung
• 
  Cho Wing
• 
  Jim James
• 
  Derek Kwok Jing-Hung