7 Line of Duty theories after penultimate episode full of clues and red herrings

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With only one more episode to go, series six of Line Of Duty is still driving fans crazy with its nailbiting twists and turns.

In last night’s penultimate episode, viewers were treated to a James Bond-style car chase with Kate Fleming at the wheel as she fled the murder scene of dodgy cop Ryan Pilkington.

Taking the fall for Kate, DS Jo Davidson was then interrogated by AC-12 in an intense interview where she said "no comment" to almost every question and discovered her uncle was actually her real father.

The episode also produced the best Ted Hastings-ism of the series, as actor Adrian Dunbar muttered "Jesus, Mary and Joseph…and the wee donkey" in exasperation of Davidson’s non-cooperation.

It’s a phrase many fans on Twitter are already hoping to slip into their Zoom meetings today.

But despite it all, are we any closer to the truth to H’s identity?

Here are a few of the clues, theories and red herrings to ponder before Sunday’s finale.

Is ‘fourth man’ actually female?

There has been increasing talk of a ‘fourth man’ in this sixth series of Line of Duty but maybe this is actually a smokescreen?

Perhaps the so-called ‘fourth man’ is a woman and, if that’s the case, the finger is now pointing to Detective Chief Superintendent Patricia Carmichael (Anna Maxwell Martin), who was brought in to take over AC-12 from outgoing boss Ted Hastings.

Morse code clue to identity of 'H'?

In last night’s episode, during the tense gripping interview with DS Jo Davidson (Kelly Macdonald), DCS Carmichael was spotted tapping her pen four times – which spells out ‘H’ in Morse Code.

Earlier in this series, imprisoned lawyer Jimmy Lakewell told Steve Arnott to "look beyond the race claim" to find H.

If you take the letters ‘race claim’ out of Carmichael, you are left with one letter: H.

How misspelt poster may have identified ‘H’

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A blink-and-you-miss-it moment during last night’s episode may have provided a clue to the identity of H.

A poster on the wall behind Jo Davidson read: “Please return all files once your finished with them Thank you” – and eagle-eyed viewers pointed out the misuse of the word "your" seems to tie in with other typos made by the unknown person secretly messaging Davidson on her laptop.

Could it indicate that H put up the poster in the police station? One fan joked: “Probably had the sign at mates rates from the OCG printers.”

Is DCS Carmichael bluffing or covering for fellow cop?

Why was DCS Carmichael suppressing lines of questioning during Jo Davidson’s AC-12 interrogation?

She stopped all relevant questioning when it came to high ranking police officers and deviated and dodged any references to Chief Inspector Osborne.

With Steve Arnott and Ted Hastings so close to getting Davidson to disclose such vital information and possibly H’s identity, why would she stop this line of questioning if she wanted the truth to come out?

Marcus Thurwell not be dead after all

Line of Duty fans are convinced the mysterious character Marcus Thurwell (played by James Nesbitt) is still alive.

In last night’s episode, members of AC-12 watched a live video link as Spanish police officers raided Thurwell’s villa and found two dead bodies identified by masked officers as Mrs and Mrs Thurwell.

The green and black night vision video footage was grainy and the faces of the corpses weren’t shown.

Fans on Twitter zoomed in on the eyes of the officer.

"That is Jimmy Nesbitt’s eyes," one wrote. "He is not dead, he is the Spanish police guy."

Is the Chief Inspector really 'H'?

There seems to be growing speculation that the shadowy character ‘H’ could be Chief Inspector Philip Osborne (Owen Teale).

Osborne, who first appeared in Line Of Duty back in series one, was involved in the apparently corrupt investigation into the racially motivated Lawrence Christopher murder case.

Osborne also refused to answer journalist Gail Vella's questions about corruption in the police force before she was murdered.

Fans on Twitter think Osborne was already involved in organised crime and he is also the reason that Ted Hastings was dismissed from his role as head of AC-12.

What is Osborne hiding?

Is Thurwell the real father of Jo Davidson?

During Jo Davidson’s AC-12 interrogation, there was the bombshell revelation that OCG member Tommy Hunter was actually her father as well as her uncle.

It transpires that Hunter raped his sister when she was a teenager and Davidson grew up thinking her father was another man, who she told Kate Fleming was a bent police officer.

Davidson said ‘no comment’ when asked to recognise Thurwell and explain their relationship so is Thurwell Davidson’s real father and did she know it was possibly Thurwell she was communicating with as the ‘unknown user’ whose IP address came from Spain?

  • Line of Duty
  • BBC

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