Line Of Duty fans will soon find out exactly who 'H' is in what promises to be a dramatic season finale. As excitement builds fever pitch, armchair detectives have gone into overdrive trying to hunt for clues as to which cast-member could be the culprit.
On Sunday evening, millions will be glued to their TV sets, hoping to finally learn the identity of H question and have many more loose ends tied up.
The hunt for the elusive 'fourth man' - with links to both the OCG and high ranking police officers - has mystified AC-12 and eager viewers ever since a blinking Dot set the wheels in motion back in Series 3.
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