In the Line of Duty 4's cast and crew
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Full Cast
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Cynthia Khan
(Insp Rachel Yeung Lai-Ching)
Donnie Yen
(Captain Donnie Yan)
Michael Wong
(Captain Michael Wong)
Yuen Yat-Choh
(Luk Wan-Ting)
Lisa Chiao Chiao
(Luk's mother)
Wai Gei-Shun
(HK Police officer)
Yuen Shun-Yi
(Drug dealer)
Michael Woods
(Black fighter on rooftop/motorbike)
John Salvitti
(Fighter in alley)
Stephen Berwick
(Fighter on motorbike)
Fairlie Ruth Kordick
(Blonde fighter)
Paul Wong Kwan
(Killer at hospital)
Eddie Maher
(Loan Shark in Seattle)
Liu Kai-Chi
(Ming)