Line of Duty season six – release date, cast, plot, trailer and H theories

Line of Duty season six start date has been confirmed.

Line of Duty season six will see AC-12’s finest – Ted Hastings (Adrian Dunbar), DI Kate Fleming (Vicky McClure) and DS Steve Arnott (Martin Compston) back for a new case very soon.

Written again by Jed Mercurio, season six will also feature Trainspotting and Harry Potter star Kelly Macdonald.

Line of Duty season six release date

Line of Duty season six will start on BBC One on Sunday 21st March at 9pm, airing weekly from then on.

There will be seven episodes in the new series, making it the longest series to date.

If you can’t wait for the new series to start, you can refresh your memory on series 1-5 by watching on BBC iPlayer now.

Line of Duty series six filming restarting

The cast and crew working on series six of Line of Duty (Picture: BBC)

What’s the plot?

Each of the first five series of Line of Duty sees the story revolving around one central character the team are investigating. The pivotal character this time is DCI Joanne Davidson, played by Kelly MacDonald.

Our heroes – Ted, Kate and Steve – will be investigating Davidson, the senior officer on an unsolved murder case. AC-12 will perhaps be asking whether Davidson played a part herself in the murder. And, if she’s a bent copper – we all know that Hastings hates bent coppers!

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Will we find out who H is in season six of Line of Duty?

Well, we know – or think we know – that H isn’t one officer but a group of four corrupt officers.

Three of them have been exposed – but during his dying declaration corrupt officer DI Cottan signalled via morse code that there are four “Hs”.

There’s always been a rumour amongst fans that Hastings might be the fourth dodgy cop. But surely that can’t be the case? Come on, not Ted!

Who’s in the cast?

Line of Duty season 6 take one

The very first take of the new series (Picture: BBC)

Alongside the regular cast and Kelly Macdonald, we know that newcomers Shalom Brune-Franklin (Our Girl), Perry Fitzpatrick (Downton Abbey), Andi Osho (I May Destroy You) and Prasanna Puwanarajah (Doctor Foster) will also be joining the series.

It’s been revealed that Shalom Brune-Franklin will play DC Chloe Bishop. Hastings announced in a statement that Chloe will be joining AC-12 to tackle a “tricky upcoming case.”

Line of Duty season six lead cast

Kelly Macdonald plays a key part in the new series (Picture: BBC)

Is there a trailer?

Yes! Here is a very quick, but VERY exciting, insight into series 6.

What else do we know?

Vicky McClure, who plays Kate, has described the scripts as ‘incredible’.

There’s been a picture of Steve without his sergeant rank insignia on his uniform. Has Steve been demoted? Or is he simply undercover?

Series six is filmed in Belfast.

Line of Duty series 6 will start on BBC1 on Sunday 21st March at 9pm – see our TV guide for more shows to enjoy. You can catch up on series 1-5 on BBC iPlayer now.

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