In a BBC interview, Mercurio also called the new DCI “the most enigmatic adversary AC-12 have ever faced”.

Brune-Franklin, who plays AC-12’s newest team member, DC Chloe Bishop, talked about her role with Radio Times, saying: “Being on set as such a huge fan of the show is such a trip-out. I was running around being a fangirl and I don’t know if that’s ever going to wear off.”

While we don’t know what else is in store for AC-12, we just know this is going to be one hell of a series (again!).

Line of Duty will air weekly from Sunday 21 March on BBC One and BBC iPlayer. Series one-five are available to watch as a boxset now on BBC iPlayer.

Line Of Duty season 6: we finally have a return date for the hit series