With time running out, AC-12 attempt to unmask 'H', the Fourth Man (or Woman) commanding the network of corrupt officers behind the cuddle of Gail Vella. But sinister and powerful forces appear intent on orchestrating a cover-up.

Line of Duty Season 6 Episodes...

• s06e01 - Series 6, Episode 1
• s06e02 - Series 6, Episode 2
• s06e03 - Series 6, Episode 3
• s06e04 - Series 6, Episode 4
• s06e05 - Series 6, Episode 5
• s06e06 - Series 6, Episode 6
• s06e07 - Series 6, Episode 7

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.