With eagle-eyed Line of Duty fans pausing every scene to work out what's going on there is nothing they are going to miss.

From barely visible clues about the identity of H to subtle gestures that hint at corruption - armchair detectives are determined to work out all the twists and turns.

While casting their eyes over every intimate detail they have also paid very close attention to the cast.

This week came the shocking realisation that DS Buckells was in a very famous scene from hit teen comedy The Inbetweeners.

The rest of the cast have also had some very prominent roles, from an EastEnders villain to a zombie killer and two different actors were even the voice of Bob The Builder.

Here is a look at where you've seen the Line of Duty cast before [warning: contains spoilers for previous series]

Vicky McClure - DI Kate Flemming

Vicky McClure as Lol (left) in This iS England 1986
Vicky McClure as Lol (left) in This iS England 1986

We initially thought Kate was with the bent coppers but she was actually on an undercover mission for AC-12.

Kate keeps going undercover to find corruption but her marriage broke down and her ex has custody of their son.

She almost single-handedly brought down The Caddy but has now switched teams, although she's been embroiled in another corruption scandal in series 6.

Vicky McClure became well-known from the popular This Is England film and subsequent series playing Lol.

The actress has also appeared in Broadchurch and BBC dramas The Secret Agent and The Replacement.

Martin Compston - DS Steve Arnott

Martin Compston in the film Ghosted
Martin Compston in the film Ghosted

The first officer we were ever introduced to, Steve joined AC-12 after an anti-terrorism job went horribly wrong and he refused to cover up mistakes.

Steve has proven to be a fine anti-corruption officer but he has got himself into a lot of trouble along the way.

He was briefly locked behind bars when everyone suspected he was The Caddy and Lindsay Denton got off the hook because they had sexual relations.

The ladies man is now battling crippling pain and an addiction to drugs that could end his career.

Actor Martin Compston rose to fame through Line of Duty but had already appeared in Monarch of the Glen and the films The Damned United and Sweet Sixteen.

Martin has gone on to rock up in Death in Paradise, Mary Queen of Scots and BBC drama The Nest.

Adrian Dunbar - Superintendent Ted Hastings

Adrian Dunbar in Ashes to Ashes
Adrian Dunbar in Ashes to Ashes

Ted Hastings (like the battle) is the leader of AC-12 and does his work to the letter of the law.

However, Ted was suspected of being H and has faced financial issues and the breakdown of his marriage.

It seems his time in the force will be over soon as Ted is being forced to resign in series 6.

As well as Line of Duty, actor Adrian Dunbar has appeared in The Jump, Ashes to Ashes, The Hollow Crown and Broken.

Kelly Macdonald - DCI Joanne Davidson

Kelly Macdonald was in both Trainspotting films
Kelly Macdonald was in both Trainspotting films

New to series 6, we can't quite work out what the deal with Joanne Davidson is.

She's already framed her former partner and is clearly hiding some dark secrets as she's been working for the OCG.

Jo has made it clear she wants out from the criminal world but is being threatened by Ryan Pilkington and we now know she is a blood relative of another character.

Scottish actress Kelly Macdonald has had many major roles, including Diane in both Trainspotting films.

She has also appeared in Boardwalk Empire for five seasons, the first Nanny McPhee film, Black Mirror and Harry Potter and the Deathly Hallows - Part 2.

Nigel Boyle - DS Ian Buckells

Buckells wouldn't let Will have a pint in The Inbetweeners
Buckells wouldn't let Will have a pint in The Inbetweeners

Ian Buckells has been floating around since series 1 and always comes in to take over when a corrupt officer is being investigated.

He's risen up through the ranks despite his idiocy but has been locked up now because of evidence linking him to corruption.

The Inbetweeners fans will recognise actor Nigel Boyle from the very first episode.

He played the barman who refused to get Will four pints of lager without seeing any ID after the lads had bought carvery dinners at the wrong pub.

Nerdy Will then pointed out that everyone in the boozer was under the age of 18 so he kicked them all out.

The actor has also appeared in Silent Witness, Peaky Blinders, Corrie and Humans.

Patrick Baladi - Jimmy Lakewell

Patrick Baladi played David Brent's nemesis Neil in The Office
Patrick Baladi played David Brent's nemesis Neil in The Office

Usually its the officers who are corrupt but in series 4 we found out solicitor Jimmy Lakewell was working for the criminals.

He represented Roz and Nick Huntley but AC-12 quickly turned the screws on him and he was locked up.

Jimmy made a surprise return to Line of Duty in series 6 but was killed off by the OCG in a gruesome manner after being rumbled as a rat.

Most of us will remember actor Patrick Baladi as Neil Godwin in The Office - David Brent's nemesis who had better dance moves.

He's also appeared in Casualty, Silent Witness, Mistresses and Bridget Jones: The Edge of Reason.

Ace Bhatti - PCC Rohan Sindwhani

Evil Yusef destroyed the Masood's lives
Evil Yusef destroyed the Masood's lives

No one likes the Central Police’s new Police and Crime Commissioner.

PCC Rohan Sindwhani joined in series 5 and seems to have a vendetta against our hero Ted.

He is more interested in making sure the press don't write bad headlines about the police rather than actually uncovering corrupt officers.

Actor Ace Bhatti played the evil Yusef Khan in EastEnders from 2010 until 2011.

Yusef was Tamwar's father-in-law and got into a relationship with his mum Zainab - but he started abusing her and died in a dramatic house fire.

Ace has also starred in the film Bohemian Rhapsody, Bend It Like Beckham, Coronation Street and Shetland.

Stephen Graham - John Corbett

Stephen Graham's character was brutally killed off
Stephen Graham's character was brutally killed off

Legendary actor Stephen Graham rocked up in series 5 of the show as the main villain.

We first saw him and his crew hijacking a police transport carrying drugs and shooting down many officers in the classic black balaclavas.

However, it transpired that Corbett was actually operating deep undercover in the Organised Crime Syndicate but had been uncontactable for months while committing serious crimes outside of his permitted remit.

In a shocking twist few saw coming, Corbett had his throat slit in the fourth episode by Ryan Pilkington when Lisa McQueen worked out he was the rat.

One of the biggest names to take part in the show, Stephen had already appeared alongside Vicky McClure in the This Is England film and series.

The Scouse actor has starred in many major films such as Snatch, Gangs of New York, The Irishman and two Pirates of the Caribbean films.

He's also been a small screen star, appearing as Al Capone in Boardwalk Empire and in ITV dramas Little Boy Blue and White House Farm.

Lennie James - DCI Antony Gates

Lennie James as Morgan Jones in Fear the Walking Dead
Lennie James as Morgan Jones in Fear the Walking Dead

Detective Chief Inspector Anthony Gates was investigated by AC-12 as they suspected his remarkable crime numbers were so high because of corruption in series 1.

While Gates wasn't a bent copper, his troubled personal life begins to collapse when the woman he was having an affair with was murdered and he was framed.

Gates was forced to go on the run wile trying to clear his name and managed to catch Tommy Hunter, but realising there was no way out he stepped in front of an oncoming truck so he would die "in the line of duty".

Popular actor Lennie James is best known for his role as Morgan in zombie horror series The Walking Dead and spin off Fear The Walking Dead.

He has also appeared in Jericho, Snatch and is the writer and star of Sky Atlantic drama Save Me.

Keeley Hawes - DI Lindsay Denton

Keeley Hawes with Richard Madden in Bodyguard
Keeley Hawes with Richard Madden in Bodyguard

Detective Inspector Lindsay Denton was the only survivor of an ambush on a transport convoy for a protected witness in series 2.

With several police officers dead attention quickly turned to Denton and she was charged with conspiracy to commit murder.

Denton claimed she was innocent but received a life sentence, although she was acquitted in series 3 because of alleged sexual involvement with Steve.

When she refused to take a bribe to conceal evidence in the Danny Waldron murder investigation she was shot dead by Dot Cottan just as she emailed Ted.

Actress Keeley Hawes has been on almost every show going on TV, including Ashes to Ashes, Spooks, The Durrells and Upstairs Downstairs.

She worked on Line of Duty creator Jed Mercurio's other BBC Drama Bodyguard and most recently appeared in Finding Alice and It's a Sin.

Craig Parkinson - Dot Cottan

Dot was one of the bad guys
Dot was one of the bad guys

The snake in the grass during the first three series, Dot was initially in Tony Gates' team before rising up through the ranks.

At the end of the first series it was revealed that Dot was working for the bad guys and had the nickname The Caddy.

He was brought into AC-12 and managed to help the OCG from inside anti-corruption, but eventually he was rumbled and died saving Kate in a dramatic shootout at the end of series 3.

Actor Craig Parkinson, who now hosts a Line of Duty podcast, has appeared in Black Mirror, Misfits and the film Four Lions.

He also played both Jimmy and Johnny Kray in the second series of Whitechapel.

Neil Morrissey - DC Nigel Morton

Neil Morrisey in Line of Duty
Neil Morrisey in Line of Duty

Detective Constable Nigel Morton was Anthony Gates' closest friend and colleague in his TO-20 team in series 1.

Nige had been resigned to desk duties after a leg injury but in series 2 it was revealed he had been faking his injury to receive disability benefits and was selling police information to the press.

Dot used Nige to make AC-12 believe The Caddy was someone else but he eventually turned on his former colleague - and managed to get away with his pension,

Morton was played by actor Neil Morrissey across the first three series of Line of Duty.

Famous for being the original voice of Bob the Builder, Neil is also known for his role as Tony on men Behaving Badly and Eddie Lawson in Waterloo Road.

The actor has also appeared in Boon, Skins, Neighbours, The Good Karma Hospital and Unforgotten, while currently starring in the new series of The Syndicate.

Polly Walker - Gill Biggeloe

Polly Walker was Lady Featherington in Bridgerton
Polly Walker was Lady Featherington in Bridgerton

Gill Biggeloe was a lawyer who worked for Central Police to make sure AC-12's investigations held up in court.

First introduced in series 3, Biggeloe returned in series 5 as the Senior Legal Counsel for the newly elected Police and Crime Commissioner.

However, it was revealed she was involved with the Organised Crime Syndicate and after being arrested was nearly killed by PC Tranter in the ladies toilet.

Biggeloe was stabbed but managed to survive when DS Arnott shot Tranter - and the former lawyer testified against the crime syndicate and was given a new identity.

Actress Polly Walker, who received a Golden Globe nomination for her role in drama series Rome, has also appeared in Waking the Dead, The Syndicate, Age Before Beauty and Netflix series Cursed.

But she's now probably most famous for playing the scheming Lady Featherington in Bridgerton.

Daniel Mays - Sergeant Danny Waldron

Daniel Mays as DCI Jay in Des
Daniel Mays as DCI Jay in Des

Sergeant Danny Waldron, an Authorised Firearms Officer in series 3, came under investigation by AC-12 as part of routine procedure after shooting a suspect.

But the team started a deeper investigation when they discovered the fatal shooting may have been unlawful.

He met a grisly end when he was shot in the neck by DC Hari Bains on the orders of nasty Dot Cottan.

But his death resulted in an investigation into historic child sex abuse as he had written down a list of names of those who abused him as a boy.

Actor Daniel Mays has had roles in EastEnders, The Bill, Ashes to Ashes, Doctor Who, Mrs Biggs and Netflix drama White Lines.

He has appeared in the films Made In Dagenham, Dad's Army, 1917 and most recently in ITV drama Des.

Thandiwe Newton - DCI Roz Huntley

Thandiwe Newton was involved in an explosive series
Thandiwe Newton was involved in an explosive series

Detective Chief Inspector Roz Huntley was at the centre of AC-12's investigation into the mishandling of evidence in series 4.

After being pushed to get results in Operation Trapdoor, Roz charged and innocent man and was reported by forensics expert Tim Ifield.

Huntley went to Ifield's flat to intimidate him and ended up banging her head on the kitchen counter in a scuffle and seemingly died.

Ifield bought an electric saw to help dispose of her body but Huntley woke up just seconds before and turned it on her attacker.

Throughout the rest of the series, Huntley tried to cover up her crime but her injured hand got infected and had to be amputated.

She was eventually rumbled by AC-12 and sentenced to 10 years behind bars for the manslaughter of Ifield and perverting the course of justice.

Not much needs to be said about BAFTA-award winning actress Thandiwe Newton, who has appeared in movies The Pursuit of Happyness, Mission: Impossible 2, 2012 and Run Fatboy Run.

She's also starred in TV shows ER as Kem and Maeve the android in HBO series Westworld.

This month the actress revealed that she would return to crediting her name with Thandiwe after an mistake on her first credit listed her as Thandie Newton - and she was "taking back what's mine".

Jason Watkins - Tim Ifield

Jason Watkins as Harold Wilson in The Crown
Jason Watkins as Harold Wilson in The Crown

Tim Ifield was the forensics expert who didn't last very long and met a grisly end.

After raising concerns with DCI Huntley about the contamination of evidence Ifield turned to AC-12 because he believed she had manipulated the evidence to frame a suspect.

Huntley went to confront Ifield in his flat which lead to a row that ended with her hitting her head on the kitchen counter and seemingly dying as he couldn't find a pulse.

Ifield bought a power saw to dismember her body but Huntley woke up and his neck was slashed during a struggle - with most of the series covering her attempt to get away with killing him

After AC-12 uncovered her crimes, Huntley eventually confessed to killing Ifield, who was played by esteemed actor Jason Watkins.

The British actor won the Best Actor TV BAFTA in 2015 for his lead role in The Lost Honour of Christopher Jefferies.

He has also appeared in Being Human, Trollied, the Nativity films and as Prime Minister Harold Wilson in season 3 of The Crown.

Owen Teale - Chief Constable Philip Osborne

Owen Teale as Alliser Thorne in the smash-hit US series Game of Thrones
Owen Teale as Alliser Thorne in the smash-hit US series Game of Thrones

Steve's nemesis, nasty Osborne was his boss at the start of the first series.

When Karim Ali was mistakenly shot dead after a door number blunder, Osborne tried to make his team lie so they could cover up their failings.

Principled Steve refused and was told by furious Osborne that his career in the police was over, but he transferred to AC-12 and the rest is history.

Actor Owen Teale is most famous for playing the role of Ser Alliser Thorne in Game of Thrones.

Thorne hated our hero Jon Snow and was head of the group who murdered him - but was sentenced to death when Snow rose from the dead.

Owen has also appeared in A Discovery of Witches, River and most recently in The Pembrokeshire Murders.

Lee Ingleby - Nick Huntley

Lee Ingleby played Roz's husband Nik
Lee Ingleby played Roz's husband Nik

Nick Huntley was Roz's loving husband and an old friend of slimy lawyer Jimmy Lakewell.

The corporate solicitor came under suspicion in series 4 when Steve was brutally attacked at his office and left in a wheelchair.

It was later revealed the whole thing had been set up by his wife, who he had been following through fear she was cheating on him.

But the reason for her shift antics was a lot darker - the manslaughter of Tim Ifield.

Actor Lee Ingleby will be known to Harry Potter fans as Stan Shunpike - the Knight Bus conductor in The Prisoner of Azkaban.

He has also appeared in Inspector George Gently, The A Word and was the voice of Bob the Builder between 2015 and 2018.

Tony Pitts - DCS Lester Hargreaves

Tony Pitts as Hargreaves in Line of Duty
Tony Pitts as Hargreaves in Line of Duty

Detective Superintendent Lester Hargreaves frequently came into conflict with AC-12 before being exposed.

He was part of the Major Violent Crime unit in series 2 and hid evidence from Ted's team.

Then he was back in series 4 on the Murder Squad before joining the Serious and Organised Crime unit in series 5.

Hargreaves was blackmailed into working for the Organised Crime Unit by Lisa McQueen, who threatened to expose he was having sex with young girls in one of their brothels.

The corrupt copper was dramatically shot in the legs by John Corbett because he thought he was H and he bled to death in hospital.

His corruption was exposed but AC-12 worked out he could not have been H because he had no contact with other corrupt officers.

Actor Tony Pitts previously starred in Emmerdale as Archie Brooks, who was also dramatically killed in the explosive plane crash in December 1993.

He played Sergeant Moss in Peaky Blinders, played two different characters in Heartbeat and appeared in Star Wars spin-off Rogue One.

*Line of Duty airs Sundays on BBC One at 9pm