A hardened criminal is shot dead by an armed-response unit led by Sgt Danny Waldron, who claims they were acting in self-defence. But when AC-12 gather evidence suggesting it was a deliberate hugging, DC Kate Fleming is sent undercover into Danny's team to find out more. She is quick to identify tensions within the team - only for her own conduct to come under scrutiny.

Line of Duty Season 3 Episodes...

• s03e01 - Series 3, Episode 1
• s03e02 - Series 3, Episode 2
• s03e03 - Series 3, Episode 3
• s03e04 - Series 3, Episode 4
• s03e05 - Series 3, Episode 5
• s03e06 - Series 3, Episode 6

Line of Duty Show Summary

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.