Line of Duty ’s sixth series premiere clocked up almost 10 million viewers, making it the most-watched drama in nearly three years.
Jed Mercurio’s hit BBC1 police thriller wowed fans on Sunday night with a jam-packed episode.
Supt Ted Hastings (played by Adrian Dunbar) is just about in charge at anti-corruption department AC-12.
But DI Kate Fleming ( Vicky McClure ) has moved over to the Murder Investigations Team (MIT), while a miserable DS Steve Arnott (Martin Compston) is also keen to quit AC-12.
Mysterious bent copper “H” is still at large and there’s a new suspicious-looking officer in town, MIT’s DCI Jo Davidson (played by Kelly Macdonald ).
And everyone on the show still communicates entirely through baffling acronyms.
So what’s going on?
With fans debating episode one conspiracy theories, here are 12 clues you may not have spotted…
The show continues on BBC1 on Sunday at 9pm.
Too many locks
In dramatic scenes, Jo drained her glass of wine, then lobbed the empty glass at an old family photo.
She had just told Farida she doesn’t have a family. So who is in the photo? Is it her as a young child with her mother? Is her mother dead? Are they estranged?
And while we’re talking about police with troubled pasts, why on earth does she have so many locks on the door? What is she scared of?
Is Terry doomed?
Right at the end, Terry is released after DCI Davidson decides he should be put on police bail without charge as there isn’t enough evidence and it “doesn’t add up”.
Then Terry’s lawyer tells him that as his flat is a crime scene, police had arranged a stay in approved premises.
She then said: “You’ll be safe there, Terry”, which is code for you’ll be dead by episode three. Has DCI Davidson set him up?
*Line of Duty continues on Sundays at 9pm on BBC One. All previous episodes are available on catch-up on BBC iPlayer.
What did you make of the series premiere of Line of Duty series 6? Let us know in the comments below.