DS Steve Arnott is transferred to the police anti-corruption unit after the death of a man in a mistaken shooting during a counter-terrorist operation by another cop.

Episodes of this season

Martin Compston
DS Steve Arnott

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Lennie James
Tony Gates

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Vicky McClure
DC Kate Fleming

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Adrian Dunbar
SI Ted Hastings

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Craig Parkinson
Matthew 'Dot' Cottan

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Neil Morrissey
Nigel Morton

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Faraz Ayub
DC Deepak Kapoor

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