Tense Line Of Duty Finale Trailer Teases H Reveal With Returning Spelling Error

There's only one episode of Line Of Duty left this season (sob) - and we're so close to finding out H's true identity.

While Twitter is abuzz with theories just who the infamous 'fourth man' could be, it very much looks as if we will finally be finding out his (or her) true identity in Sunday night's finale, if the brand new trailer is anything to go by.

The 30 second snippet, which teases what's to come in the season six finale, shows Joanne Davidson (Kelly Macdonald) being transported while in handcuffs.

Elsewhere, the infamous misspelling of definitely as 'definately', a defining feature of H's communication, flashes up on screen - as AC-12 find themselves racing against the clock to uncover the ultimate bent copper.

We're told that the investigations that have been at the heart of the last six seasons of Line of Duty have been building up to this crucial moment - which could at long last see H unmasked.

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The trailer culminates in a tense armed shoot off between AC-12 and a series of armed, masked culprits, before fading to the titles.

If anything, this has left us more confused than ever before!

There's a number of theories as to who H could be - ranging from the allegedly 'murdered' Marcus Thurwell (played in a cameo by James Nesbitt) - but an increasing number of people believe the evidence is pointing towards Patricia Carmichael (Anna Maxwell-Martin).

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As well as being grossly unlikeable due to her short and sharp demeanour towards the rest of AC-12, one eagle-eye observer noticed that she tapped her pen down on the desk four times.

Four dots represents the letter H in morse code - and it did not go unnoticed by fans.

Viewers are especially convinced considering the clue Dot Cottan gave before he died.

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When asked to name the corrupt officer in the OCG, he indicated the letter H by blinking when Kate read through the alphabet. It was also revealed that he had moved his hands four times - indicating H in morse code.

But could this be, in true Jed Mercurio style, be the ultimate red herring? We're going to have to tune in to find out...

Line of Duty concludes Sunday at 9pm on BBC One.

Topics: Drama, BBC, TV & Film, Line of Duty

Kimberley Bond

Kim is a journalist at Tyla, and has previously worked at the Evening Standard, Radio Times as well as several national newspapers. A showbiz obsessive and a television fanatic, Kim is particularly interested in celebrity gossip, A-list events and the latest releases on either the big or small screen. Contact her at [email protected]

@0xKimberley