There's only one episode of to go and Line of Duty fans are still as baffled now as they were right at the beginning of the sixth series.
But one fan reckons that they've spotted a major 'H' spoiler that will be exposed during the finale - on actress Anna Maxwell Martin's Instagram account, no less.
Her vile character DCS Patricia Carmichael returned recently to announce that AC-12 would be merging with AC-9 and other units as cuts were made to anti-corruption.
Fans were also left devastated when it emerged that Ted Hastings was being forced into early retirement. During Sunday night's episode, DCI Joanne Davidson was brought in for questioning and that laptop she had been messaging 'H' on was brought into question.
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