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Line of Duty's creator Jed Mercurio has confused the police drama's fans with a new clue hinting that another series could be on the way - and it's cryptic AF.
However, in a Tweet written after the show aired, the TV writer posted a pic of the AC-12 sign with the words 'Carry the Fire'.
With no replies allowed on the Tweet itself, fans can't even guess what the words might mean.
Could it mean that another series is on the way, or is it simply meant as a tie-up to the six series we've seen so far?
Just as the show was airing, Vicky McClure, Martin Compston and Jed Mercurio wrote their appreciation for the fans and their fellow cast members.
Mercurio posted: "Working with @Vicky_McClure @martin_compston #AdrianDunbar has been the highlight of my career. Thanks to the rest of the cast, our brilliant crews and the production team @worldprods @BBCOne @BBCTwo for six incredible seasons."
While DI Kate Fleming's Vicky McClure wrote: "The audience support has been unreal, the creativity of merchandise, the artwork, groundbreaking viewing figures and the hype. It's not lost on me how lucky I am to be a part of Line of Duty, not just because of the success of the show but the lifelong friendships we've all gained."
DI Steve Arnott actor Martin Compston added, before the show: "Been a wild few weeks and mental 10 years with the most amazing cast & crews. None more so than the 3 below who I'd be lost without. A job of a lifetime only made possible by the fans tuning in series after series, for that I can't thank you all enough. Answers coming? Definately."
In the closing moments of last night's episode we were told that AC-12's position in fighting institutionalised corruption in the police force was weaker than ever, and with DS Carmichael at the helm of a scaled down AC-12, things don't look good for the team.
So could this be the return the fans so desperately want, and could there be a series 7? Only time will tell.
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