Line Of Duty's crucial hints show will return for series 7 - Buckells' smirk to Ted appeal Mirror 3 hrs ago Emmeline Saunders While last night's finale dealt with the major storyline that has arced over six whole seasons, there's still plenty of burning questions that we need answering. And unlike with previous series, there was no post-credit announcement that another one will follow. With writer Jed Mercurio remaining tight-lipped about his future plans, will there ever be more Line Of Duty? Grab your office pass and favourite waistcoat - it's time to examine the evidence, AC-12 style. Buckells never actually admitted to collusion - and smirk at the end