Line of Duty fans want answers and it seems they'll get some and an extra bonus on top.
Martin Compston, who plays AC-12's Steve Arnott in the BBC police thriller, begged fans to sit all the way through to the end of the final's credits.
Posting the request on Twitter , Martin urged viewers to remain seated once the 90-minute extravaganza had come to an end.
"Hey folks hopefully if your jaws are back up from the floor in time, there’s a little something at the very end of the show which means a lot to the whole @Line_of_duty family, much appreciated if you could stay tuned for it."
The request means that fans will have to wait a few extra minutes to find out the big reveal.
Martin, 34, has been keeping quiet on any spoilers but it seems the latest tease was too much for some Line of Duty fans.
One said in response to the tweet: "I'M NERVOUS!!! But excited!"
"MARTIN STOP IT! our hearts are on edge already," said another.
A third added: "As long as I know who H is & I haven't flipped the sofa then I will."
Line Of Duty's Martin Compston hints fans might have to wait until next series to find out who H is
The Scottish actor appeared on Channel 4's Sunday Brunch earlier in the day where he Line Of Duty's Martin Compston hints fans might have to wait until next series to find out who H is .
Ahead of tonight's finale the actor explained that he didn't know who would make it to the next series.
He teased: "The show has already been commissioned for another series - but who knows who will make it there.
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"I think what makes Jed so good at writing is that there will be a few pay-offs. I hope people won't be disappointed."
He added: "There will be some things resolved. We've got a 90-minute episode. I think it's alright."
The final Line of Duty airs tonight on BBC One at 9pm
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