Line of Duty viewers were left underwhelmed on Sunday night as the identity of 'H' was finally revealed to the nation.The wait for the final episode of series six spurred on countless theories over the fates of characters, and the truth about the mysterious 'H'.'H' or 'The Fourth Man' is the name given to a traitor within the upper ranks of the police force, who has been secretly pulling strings for the OCG (organised crime group) throughout Line of Duty’s run.It was billed as the moment viewers finally find out the identity of The Fourth Man, with the past six series building to this point.Fans finally found out 'H' was in fact DI Ian Buckells (Nigel Boyle) during the dramatic 60-minute finale episode, however, people watching the BBC One.
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