Ahead of the new series starting this weekend they admitted they never feel safe as writer Jed Mercurio is known for big twists and killing key characters off. Martin, 36, who plays Detective Sergeant Steve Arnott, said: “It would be interesting in this series, or next, if one of us goes. “We haven’t dealt with this, we kinda now come as one package in our heads.
“With Jed he would never do it for the sake of doing it, it would be to further the story. But it would be interesting.
“It is hard to think how it’s going to work, knowing one of them wasn’t going to be there. So that would be interesting if it ever
On a possible end to her character or even the series, Vicky, 37, added: “It would be a massive shame. You know nothing lasts forever. It will be a really sad time. It’s the longest-standing job that I’ve ever had. So, yeah, I’ll keep going until I’m told to not.”
In the past Craig Parkinson and Keeley Hawes both saw their characters killed off after several series in a shock move by Mercurio.
But whether he would risk upsetting fans by removing one of the AC-12 anti-corruption trio remains to be seen.
The sixth series will feature new characters including Detective Chief Inspector Joanne Davidson played by Kelly Macdonald.
She was thrown in at the deep end – with what may be the longest interrogation scene ever seen on the show, lasting 30 minutes.
She said: “One of the interview scenes is bigger than anything I’ve ever done before – I think over half an hour. We filmed it over two days and on the first day, the cameras were only on my character.
“I was told there were 50 cameras set up on me just in that one day which is mind blowing. It was like doing a play and it was a real treat to have that kind of material in one scene.”
Davidson is the senior investigating officer on an unsolved murder case which attracts the attention of the anti-corruption team.
On her character, who looks to be at the centre of the series, Kelly added: “At the start she’s quite a lonely figure. She’s struggling and we don’t quite know why.”
Another new recruit to the series is Shalom Brune-Franklin who plays DC Chloe Bishop.
More than nine million watched the finale of the fifth season.
●Line Of Duty returns to BBC One on Sun-day at 9pm.