Cottan and DC Morton uncover the identity of the Caddy, who's been leading the criminal gang operating within the police. Dryden gets charged. Kate is unsettled by Steve's change of heart but is determined to prove that Lindsay was involved in the ambush.
Steve Arnott is a young officer who's fallen foul of his superiors for refusing to help in the cover-up of an operation that ended in the shooting of an innocent father. He seems ideal to join AC-12, an anti-corruption police unit, just as it starts to investigate Detective Chief Inspector Tony Gates, the regional force's Officer of the Year.
Line of Duty - Series 2, Episode 6 Synopsis and Schedule