But more importantly - will we finally find out who H is?

Line of Duty is going to close out season 5 with a feature-length finale. The episode, which is set to air on May 5, will be 90 minutes long - and, according to the BBC, will reveal some "closely guarded secrets." Fairly understandably, just what those "closely guarded secrets" are going to be hasn't been revealed. But we're keeping our fingers crossed that this means we're finally going to find out who H is (please?!). Superintendent Ted Hastings, played by Adrian Dunbar, has been the prime suspect to be the infamous H so far this season. However, the actor admitted to The Telegraph that even he "didn't know" who H actually was. When asked if Ted was the mysterious character, he replied:

“Well, that’s the question a lot of people are asking. It’s difficult, you know… we might find out at some point.”

He clarified that he "didn't know" who the infamous bent copper was, before speaking about the reason he reckons viewers have become so drawn to the show. He said:

“[Line of Duty] is complicated to follow, but I think that’s why people like it. It’s not sensational for the sake of it; it doesn’t go down bizarre routes. The twists and turns are based on really interesting legal or medical anomalies.”

The BBC police procedural - created by Bodyguard's Jed Mercurio - has had fans hooked since it returned in late March. And while it's already been renewed for a sixth season, Mercurio recently spoke about how he is set to have a "very specific conversation" with the BBC about the future of the show. He told The Sun:

"We’re looking forward to a conversation with the BBC once series five has aired... about whether there is an appetite from fans to have more, or whether there’s a feeling the show is coming towards its natural arc. "That conversation will be very specific, which is whether series six will be the last, or whether the BBC would be prepared to commission a seventh so we can approach series six knowing it’s not the last."