Line Of Duty will be back on Sunday night and fans are eager to find out whether AC-12 will finally crack the case on the elusive H.
And in a teaser released on Monday, viewers can be certain of an action-packed finale episode complete with a police standoff, the return of balaclava men and the discovery of a written note with THAT ‘definately’ misspelling.
The trailer starts off with Superintendent Ted Hastings (Adrian Dunbar), who is facing imminent retirement, state: ‘All of these suspicious deaths were orchestrated by one officer in particular, H. The fourth man.’
Line Of Duty will be back on Sunday night and fans are eager to find out whether AC-12 will finally crack the case on the elusive H
Hastings’ powerful words went alongside flashbacks of the deaths of solicitor Jimmy Lakewell, police officer Lisa Patel, journalist Gail Vella and former Detective Inspector Marcus Thurwell- whom fans believe is still alive.
The trailer then shows acting Superintendent Jo Davidson (Kelly MacDonald) leaving the high-security prison in handcuffs, only to end up alone in a van with a corrupt prison officer who previously injured Lindsay Denton in series three.
Jo says: ‘What’s going on?’, before the camera flashes a sinister look from the prison officer.
And in a teaser released on Monday, viewers can be certain of an action-packed finale episode with a police standoff, the return of balaclava men and that ‘definately’ misspelling
AC-12: The trailer starts off with Superintendent Ted Hastings (Adrian Dunbar), state: ‘All of these suspicious deaths were orchestrated by one officer in particular, H. The fourth man’
Fall from grace: The trailer then shows acting Superintendent Jo Davidson (Kelly MacDonald) leaving the high-security prison in handcuffs
Scary: She ends up alone in a van with a corrupt prison officer who previously injured Lindsay Denton in series three
A handwritten note is also teased in the trailer, with the word definite misspelt to mirror what viewers have seen previously.
A huge clue of the identity of H began to emerge in series five, when the OCG communicated with ‘H’ through a computer.
Eagle-eyed fans were quick to notice H spelling definitely as ‘definately’, and this misspelling has been repeated in subsequent episodes.
Will this handwritten report be the breakthrough AC-12 need to close in on ‘the fourth man’?
Clue: A handwritten note is also teased in the trailer, with the word definite misspelt to mirror what viewers have seen previously- will this be the clue AC-12 needs?
Drama: It certainly seems Hastings and his team are on to something as police cars speed down the road, while armed officers close in on a residential area and Hastings briefs his team
Shootout: And it only gets more dramatic as balaclava men jump out of vehicles armed with guns themselves
It certainly seems Hastings and his team are on to something as police cars sped down the road, with armed officers closing in on a residential area during the trailer.
The Superintendent briefs DI Kate Fleming, DI Steve Arnott and DC Chloe Bishop as they arrive at the scene.
Hastings says: ‘AFO’s will secure the suspect down’, while the words ‘Every investigation has led to this… H’.
Crime: The police board shows AC-12’s work so far; with DI Dot Cottan, Chief Superintendent Derek Hilton, Gill Biggeloe and OCG members including Lisa McQueen and Tommy Hunter
And it only gets more dramatic as balaclava men jump out of vehicles armed with guns themselves.
Kate opens the police van, brandishes her gun and shouts: ‘armed police’ before the screen fades to black.
Viewers were stunned on Sunday night when it appeared James Nesbitt’s character was killed off before he even appeared on screen – but some are convinced it was a cover-up.
Corrupt? Partricia Carmichael will also return after her suspicious behaviour during the interview on the last episode
Towards the end of the nail-biting penultimate episode, Guardia Civil police officers stormed Marcus Thurwell’s Spanish home, while the AC-12 team watched via video link.
When the law enforcement officers entered the home, they were met by two bodies, and a Spanish captain turned to the camera and identified one as ‘Senor Thurwell’.
While many viewers expressed surprise an actor of Nesbitt’s calibre was denied even a scene, some were left convinced Thurwell was in fact the Spanish AFO leading the raid on his home.
Theory: Fans were stunned on Sunday night when it appeared James Nesbitt’s character was killed off before he even appeared on screen – but some are convinced it was a cover-up
Towards the end of the penultimate episode, Guardia Civil police officers stormed Marcus Thurwell’s Spanish home, while the AC-12 team watched via video link. They found Thurwell’s body (right) – but some fans believe the Spanish captain was Thurwell in disguise (left)
One tweeted: ‘Is it just me or was one of those Spanish “police officers” Thurwell? I’m sure it was him.’
Another wrote: ‘Exactly what I was thinking? Nice job if James Nesbitt only got paid for a few photos so I suspect that Marcus Thurwell is 100% alive.’
And one commented: ‘Is this Marcus Thurwell or have they just found the Spanish Jimmy Nesbitt to play the part?’ – sharing a series of screenshots to illustrate the likeness.
AC-12 were looking into the retired former detective chief inspector after SI Steve Arnott (Martin Compston) learned that Gail Vella – the journalist who was murdered – had been looking into the death of Lawrence Christopher while in police custody – a case Thurwell was in charge of.
Interesting: While many viewers expressed surprise that an actor of Nesbitt’s calibre was denied even a scene, some were left convinced that Thurwell was in fact the Spanish AFO
Thurwell also has links to Darren Hunter, the son of former organised crime group boss Tommy Hunter.
The OCG also murdered Oliver Stephens-Lloyd before he had an opportunity to give evidence about sexual abuse at Sands View Boys’ Home, with Superintendent Ted Hastings convinced Thurwell is connected to the killing and the abuse cover-up.
When Thurwell was found ‘dead’, Hastings was visibly exasperated – with time running out for him to solve the mystery before his impending retirement.
Elsewhere in the episode, viewers learned PC Ryan Pilkington met a grizzly end, after working as an inside man in the Murder Investigation Team (MIT) for the Organised
After being lured to a lonely car park by DCI Jo Davidson during the previous episode, Kate was met by armed officer Ryan who said he planned to kill her as he held up his gun and aimed it at her.
She’s alive! Line Of Duty ended on a tense cliffhanger last week after gunshots were fired as DI Kate Fleming and bent copper Ryan Pilkington held up their weapons
The episode ended as two gun shots sounded, before the new episode revealed that Ryan had been shot twice in the chest, with Kate and Jo fleeing the scene in a Thelma and Louise-inspired fashion.
When DI Steve Arnott arrived with the AC-12 unit they discovered that Kate and Jo had gone on the run and Ryan was dead.
DCS Patricia Carmichael could be heard telling officers that the duo were considered to be ‘armed and dangerous’ and sent out an order for their address.
Despite the gripping hunt for Jo and Kate which commenced, fans were overjoyed that one of their favourite characters had survived.
Cliffhanger: After being lured to a lonely car park by DCI Jo Davidson (pictured) [Kelly MacDonald] during the previous episode, Kate [Vicky McClure] was met by armed officer Ryan
Man down: The episode ended as two gun shots sounded, before the new episode revealed that Ryan had been shot twice in the chest
Elsewhere during the new episode, fans were left convinced that Detective Chief Superintendent Patricia Carmichael is the fourth man after Sunday’s episode.
The officer, played by Anna Maxwell Martin, placed herself at the centre of the action as she ordered Kate Fleming to be arrested following the shootout and then tried to shut down Ted Hastings’ questions during a very intense interview of Jo.
Some viewers even theorised that Carmichael was trying to send a message during the ‘puzzling’ interview – which also saw Jo discover her paternity despite offering more ‘no comments’ than answers – based on how often she tapped her pen.
This Morse code theory popped up during Arnott’s questioning of Davidson, specifically when he tried to get information about Gail Vella’s laptop and computer.
Could it be? Line of Duty fans were left convinced that Detective Chief Superintendent Patricia Carmichael is the fourth man after Sunday’s episode
Although Davidson remained tight-lipped, Carmichael did seem to start sweating a little as she tapped her pen four times and took a sip of water.
Morse Code is an alphabet that spells out words or messages using a series of short and long sounds, with the officer appearing to make four taps and spell out H.
Carmichael again set alarm bells ringing when she cut off Hastings at the end of the interview following his knockout question about Osborne being H.
Cutting off the AC-12 head’s question, she declared that Davidson was being charged with ‘perverting course of justice and misfeasance in public office’.
Line Of Duty continues on BBC One on Sunday at 9pm.
Trying to hide something? The officer, played by Anna Maxwell Martin, tried to shut down Ted Hastings’ questions during a very intense interview of Jo Davidson
Theories: Fans were quick to declare that Carmichael is H, with some also suggesting the Morse code theory
Emotional: Jo Davidson broke down as she discovered her true relationship to Tommy Hunter
LINE OF DUTY SEASON SIX: WHAT ARE THE MAIN FAN THEORIES?
Season six of Line Of Duty has left fans with more questions than answers, with viewers flocking to Twitter to question what exactly is DCI Jo Davidson is up to, whether Kate Fleming has really left AC-12 and who is H?
Here, MailOnline examines some of the most prominent fan theories
Kate Fleming HASN’T left AC-12 and is working undercover
One of the most shocking discoveries was AC-12’s Kate is now working with a new team- with some fans suggesting she could even be the infamous H.
While chatting to her new gaffer DCI Davidson, Kate said: ‘I got fed upon nicking coppers, I’d rather go after the psycho who murdered Gail [Vella].’
But despite seeming confident in her new role, some viewers were left wondering if all was at it seems and theorised that Kate could still be undercover for AC-12.
Even after she tipped off Davidson and incurred the wrath of Ted Hastings, fans have continued to speculate that she is so deep undercover that even Hastings is having to keep her true agenda secret.
Kate Fleming HASN’T left AC-12 and is working undercover: Is it true? The jury is still out on this one
DCI Jo Davidson is being blackmailed by an Organised Crime Group
Jo has already survived a grilling from AC-12’s top team and appeared to clear her name when it was ex-girlfriend PS Farida Jatri who seemed to have taken part in corruption.
However, Jo was seen hitching a ride with known bent copper Ryan Pilkington and taken to collect a burner phone, making her look suspicious once more.
Fans, however, are convinced the DCI is being blackmailed by an OCG, following her emotional outburst when she was summoned to pick up a new burner.
DCI Jo Davidson is being blackmailed by an Organised Crime Group: Is it true? After her car park outburst it seems increasingly likely
DCI Jo Davidson’s mother is Anne-Marie McGillis
Fans speculated over who Jo’s mother could be after she was seen in a photograph in the first episode.
Many theorised her mother has something to do with season five character John Corbett’s [Stephen Graham] mother Anne-Marie McGillis, who was killed by an Irish Republican paramilitary group sometime after 1989.
DCI Jo Davidson’s mother is Anne-Marie McGillis: Is it true? There simply isn’t enough evidence yet to determine on way or the other
Gail Vella is still alive
Although season six has centered around the murder of journalist Gail Vella, one obscure theory is that she is in fact still alive.
Craig Parkinson, who played Matthew ‘Dot’ Cottan in the show, said on BBC Sounds podcast Obsessed with Line of Duty: ‘Somebody is in that flat and there’s some connection with Gail Vella, the investigative journalist.
‘You don’t cast someone like Andi Osho and then just have her as little magazine prints and stick them up on a kitchen wall.’
Sarah Millican – who also appeared on the podcast – went on to suggest Vella may have been a former lover of DCI Davidson’s.
Gail Vella is still alive: Is it true? It seems unlikely that the scale of police corruption is so huge that they could fake a murder victim
DC Chloe Bishop is Tony Gates’ daughter
Bishop is one of AC-12’s newest recruits, and as Gates and his wife Jools had two daughters, Natalie and Chloe, viewers have suggested their shared first name ‘can’t be a coincidence’.
Gates’ daughter was last seen in season one in 2012, which means she’d be roughly the same age as Bishop is now.
Fans have suggested that Bishop either took her mother’s maiden name or the name of a step-father, so that her true identity remains a secret – for now.
Gates died at the end of the first season when he walked into a busy road after getting a confession from gang leader Tommy Hunter, who had been blackmailing the police officer into covering up their criminal activity.
DC Chloe Bishop is Tony Gates’ daughter: Is it true? The dates and facts line up, but there still isn’t enough to write it off as a coincidence just yet
DCI Jo Davidson’s mystery blood relative is…?
After it was revealed that Jo’s DNA matched someone on the Police National Computer, fans theorized who that could be.
The overriding theories suggested that Davidson’s relative was either Tommy Hunter, of series one and two, Mike Dryden of series two, John Corbett of series five, or Derek Hilton, killed off in series four.
Tommy Hunter was the leader of the OCG in earlier series of the show, and a paedophile. His character is dead.
Mike Dryden, the former Deputy Chief Constable, was last seen resigning from his post for perverting the course of justice in series two. His Scottish links also suggest he could be related to Davidson.
John Corbett was an undercover cop in series five who had his throat slit, leaving behind a wife, two daughters, and a mysterious link to a woman, Anne-Marie, whom fans claim could also be Davidson’s mother.
Derek Hilton was a Chief Superintendent and later the Assistant Chief Constable of Central Police. He was also secretly affiliated with organised crime. He was shot in the mouth in a staged suicide in season four.
Other suggestions were Gill Biggeloe, Jackie Laverty, Lindsay Denton or Terry Boyle.
After it was revealed that Jo’s DNA matched someone on the Police National Computer, fans theorized who that could be. Scottish Mike Dryden was last seen resigning from his post for perverting the course of justice in series two
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