The fourth series, starring Thandie Newton as DCI Roz Huntley, has been a huge hit with viewers.
Pulling the strings, as far as I could work out, had been a cabal of criminals who'd been executing a grisly plan to blackmail senior officers - hence Paul Higgins's ACC Derek Hilton turning corrupt, and Roz Huntley over-trustingly falling in with him.
The series, filmed in Belfast, has had more than eight million viewers on the edge of their seats.
She broke down during a gruelling interrogation, confessing as she realised the mountain of evidence against her, and was slapped with a jail sentence.
"The fact is that Line of Duty has a very big story arc across all the series and one of the things that we haven't done is to delve into Hastings' past ..."
Members of the syndicate continued to terrorise those involved with police unit AC-12, while a Balaclava Man attempted to storm the building to confront lawyer Jimmy Lakewell, only to be shot dead by SIO Ted Hastings (Adrian Dunbar).
"I've never seen anything more intense!"
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Koscielny added: "Before this ( Manchester City ) game, we were in a fairly dark period". That's the most important thing in our job. I am very proud for the players.
If you're still reeling from the most recent "Line Of Duty" finale and are already counting down the weeks until you can get your fix again, we're afraid we may have some disappointing news.
The number, the highest overnight figure in the show's history, is expected to grow after viewers watching on catch-up are taken into account after seven days.
The previous three series of Line Of Duty, which aired on BBC Two, saw audiences peak at 5.6 million.
"The regulars are definitely up for doing more..."
But fans will have to wait a long time to see what the truth is, as it seems that the show won't be back on screens for a while.
Jed has previously hinted that he may explore Hastings' past. "But if there's not another commission, I would have to approach series five as the last".