Line of Duty’s Martin Compston teases shocking episode five ending

That’s what we’re wondering following a curious comment from series star Martin Compston, who plays DI Steve Arnott in the series and who shared a video on Twitter while thanking various critics for not spoiling elements of future episodes.

In the video, co-star Vicky McClure tries and fails to scare Compston on set by sneaking up on him – only for Compston to turn the tables and surprise her, eliciting a huge scream from the Kate Fleming actress. And apparently, we might all be similarly shocked by what’s coming at the end of episode five…

“Big shout out to the media for not giving away any spoilers much appreciated!” Compston wrote on Twitter.

“Especially when they know there will be more than a few Vicky McClure-like reactions from below to what’s coming in Episode 5.”

Previously, early listings for the series’ sixth episode hinted at some pretty major developments in Line of Duty’s fifth episode, implying that some “tragic events” took place that the AC-12 team would have to recover from. Notably, Kelly McDonald’s Jo Davidson and McClure’s Kate Fleming were also missing from the episode six cast list, leading some fans to theorise that one or both of the characters could be for the chop before the end of episode five.

So is Compston hinting that Jo or Kate could be in the firing line at the end of episode five? Will the episode end on a huge cliffhanger about who could be the next victim of the OCG? Or is there another big surprise – possibly related to Davidson’s mysterious relative – coming our way that we could never see coming?

Well, don’t ask us – we’re not AC-12. We just like watching them do things.

Line of Duty airs on Sunday nights at 9.00pm on BBC One. Want something else to watch? Check out our Drama page or our full TV Guide.