Viewers have already been left on tenterhooks, waiting to hear whether DI Kate Fleming, played by Vicky McClure, has survived after getting duped into going to a car park where gun shots were then heard.
The show, which tracks the many and varied exploits of the police anti-corruption unit, is known for creating great suspense and tension, but they'll struggle to top this week's episode, which will feature an interview that lasts for 29 minutes and 22 seconds, which is the longest scene ever on the show.
Make sure you remember to get the brews made well in advance of that scene, then.
A source close to the show told Mirror Online: "Line Of Duty fans are used to AC-12 being thorough in their interviews in their search for bent coppers, but this scene is incredible and you can't look away for a moment.
"Just when you think it could end there are more questions and more answers and more revelation.
"Lots of the secrets are going to come out and there are more pieces of the puzzle in place."
When we left off last week, Fleming had just been called to the car park by Jo Davidson, and was left in a stand-off with OCG - organised crime group, for those who aren't up with the lingo - member PC Ryan Pilkington.
After the screaming was done, two gunshots rang out, and no-one knows who discharged their weapon first.
Fans of the show have been left wondering whether all of their favourite characters will make it through to the end of this season, given that creator Jed Mercurio has frequently said that no-one is safe.
That means that DS Steve Arnott - played by Martin Compston - as well as Superintendent Ted Hastings and Fleming are all potentially fair game.
This season's strapline was 'Lies Cost Lives', which further suggests that someone big could be on the way out.
McClure spoke on the show's podcast earlier this week with former cast member Craig Parkinson. Parkinson's character 'Dot' Cottan bit the dust after three series, and McClure stressed that no-one is above the chop if the story dictates.
She said: "Well, every episode is terrifying and Jed is always there to serve the story - it is exactly what happened with Dot.
"Dot's time came when it was right to serve the story and that is what Jed will always do. I don't want to put everything out there but Jed serves the story."
Line of Duty will continue tomorrow night at 9:00pm on BBC One.
Featured Image Credit: BBC
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