Flynn's old flame guides him deep into the world of body art, heroine and murder.

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Chris suffers body blows when she is the forced to fight with her fists to nail a big time gangster.

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Harris and Angie's son, Joshua, is abducted in a tragic case of mistaken identity.

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Angie goes undercover to hunt down a serial killer who is praying on a popular tourist hotel.

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Church risks radiation exposure in a desperate attempt to avert the detonation of a dirty bomb.

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A stalled murder investigation forces Flynn to go undercover in a Middle Eastern consulate.

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A domestic violence victim takes the law into her own hands.

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A hitman target Chris when she investigates the sex murders of two teenage boys.

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Luke Harris uses his bi-polar disorder as a cover to try and find a killer in a psychiatric clinic.

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Apparently addicted to opium, Harris strikes a deal with a major drug dealer.

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A revelation in a murder investigation suggests that the homeless are being exploited for snuff movies.

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Harris goes undercover as a translator for a Malaysian drug cartel.

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Church and Gray attempt to sting an allusive crook but they might have targeted the wrong man.

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Betrayed by an old love, Church faces execution at the hand of a major drug dealer.

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Angie Piper pursues a personal journey of revenge for the shocking death of her sister.

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When a gay friend of Chris' commits suicide, Chris suspects he was murdered as part of a paedophile cover up.

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Harris' complex relationship with his daughter threatens to implode.

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Church hunts down a politically connected businessman importing cocaine.

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Harris' opium addiction nearly costs him his life when he is exposed during an investigation.

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Angie and Harris discover the shocking truth about their colleague, Megan Walsh.

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Undercover as a hitman, Church is injured and suffers amnesia.

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Accused of corruption and under investigation by IA, has Church reached his use-by date?

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Flynn and Church are undercover in rival gangs when the city erupts into violence.

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Angie goes undercover to bust a contract killer by posing as his long lost daughter.

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The murder of an illegal immigrant leads undercover to a brothel trading in sex slaves.

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Chris is involved in a car smash which leaves a young boys permanently disabled.

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Harris' obsession with Angie's new partner spirals out of control when one of the Undercover unit falls victim to a serial killer.

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Angie frantically tries to clear her lover's name while Harris works equally hard to convict him as the serial killer.

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