Britain issued a collective gasp on Sunday night as Ian Buckells was exposed as Line Of Duty's fourth man. But for some eagle eyed viewers the much anticipated big reveal was anything but - as they had been picking up on small clues it was the seemingly incompetent Buckells all along.
As one of the few surviving and as yet unjailed senior officers who had been in the show from the very beginning, for some Buckells, played by Nigel Boyle, was the obvious suspect.
Along with his longevity, they noted Buckells' suspicious behaviour. Way back in season one we saw him interact with a young Ryan Pilkington, then a child villain, with fans later noting he treated the tearaway to a Big Mac while interviewing him.
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