DS Steve Arnott is arrested on suspicion of cuddle but continues to protest his innocence. Does DC Kate Fleming's undercover operation hold the key to Steve's guilt and the identity of the Caddy?.

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.