(Pocket-lint) - Police correction drama Line of Duty has been absent from our screens for far too long but Ted Hastings and the AC-12 team are back and they have their work cut out for them. Here's everything you need to know about Line of Duty series six, including how to watch it, when it is out and how and where to binge watch the previous seasons in preparation. Line of Duty release date: When is Line of Duty season 6 out? Following months of delays due to the current global pandemic, the sixth series of Line of Duty will air on Sunday, 21 March 2021 on the BBC and BBC iPlayer in the UK.