Mondays, on BBC Two
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.
Dryden claims that Lindsay was at the car park when he was photographed in the car with Carly. Steve gets closer to Lindsay but reveals to Kate that he is acting undercover as she had done earlier. Now he believes that Lindsay is behind the ambush. In flashback, Lindsay spied on Dryden with Carley at the reception and was moved to sympathy for Carly after a brief conversation in the ladies cloakroom. She followed the pair to the car park, and saw Tommy Hunter beating her up. She approached Hunter later but is distracted by Akers. Later Akers visits Lindsay at her home asking for help to release the pimped and abused Carly escape Hunter's clutches. With a pay-off, she convinced Lindsay to assist in a handover of Tommy. Cotton was behind the scheme. Her pay-off is found hidden among the possessions taken from Lindsay's mother's room. The buried body is not Carly's; her whereabouts unknown. Dryden is given a suspended sentence and resigns. Lindsay is convicted. Cotton is asked to remain in AC12.
Lindsay manages to escape her kidnappers in violent and traumatic circumstances that leads to the death of one and the hospitalisation of another, and AC12 finds itself forced to chose loyalties between Lindsay and Dryden. With the evidence mounting against Dryden, the discovery of pictures showing Dryden and 15 year old Carly Kirk together is the final nail in the coffin, resulting in Steve and Kate finally arresting the DCC. However, when presented with AC12's evidence, Dryden still strongly maintains he is being set up.
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