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Line Of Duty star Adrian Dunbar has teased fans of the show by revealing the first episode of new series will be a 'head wreck' that they find 'shocking'.
Adrian Dunbar who plays Superintendent Ted Hastings on the hit BBC police drama and appeared on The Graham Norton Show last night where he suggested the audience will be given a few surprises by series 6 .
He said: "18 months have passed so the landscape has completely changed.
"We are starting from a place that the audience will probably find a bit shocking at first.
"Things and people have been moved around so the first episode is going to be one of those 'head-wrecks' for the audience."
© BBC/World ProductionsAdrian Dunbar plays Superintendent Ted Hastings on the hit BBC police drama
Adrian, who appeared alongside Vicky McClure, who plays Detective Inspector Kate Fleming, added they hadn't initially known whether they were even going to receive a second series commission from the hit show.
He said: "It was a slow burn. The first series was great, but we didn't know we would get a second one.
"Then we got a second one and halfway through that suddenly the numbers built and since then it's just taken off - it's big and the anticipation is massive. It's intense."
© PAAdrian said the first episode of the new series would be a 'head wreck' on The Graham Norton Show
It was recently revealed that Craig Parkinson, who played Matthew 'Dot' Cottan, will be hosting an episode-by-episode podcast for season six alongside fellow castmates and celebrity guest stars.
Speaking about the new project, he said: "Returning to the world of Line of Duty , this time as a podcast host, is very exciting. I'm looking forward to chatting with some fantastic guests, cast members old and new and getting as frustrated as everyone else trying to work out where AC-12 are taking us this season."
© BBC/World Productions LtdAdrian with his co-stars Vicky McClure and Adrian Dunbar
Also returning to the show will be Detective Sergeant Steve Arnott, played by Martin Compston.
Speaking on That Gaby Roslin Podcast, Martin teased more about the upcoming series.
He said: "In some way the whole series has been building to this.
"I think there are a lot of big answers coming in this series."
The new series of Line Of Duty will air on Sunday 21 March at 9pm.