Line of Duty fans think a subtle misspelling in a scene from the latest episode could be the key to figuring out the identity of “H”.
As fans were quick to spot, the same misspelling has been used on the series before – by none other than superintendent Ted Hastings (Adrian Dunbar).
Line of Duty continues at 9pm on Sunday on BBC One.
Spoilers follow for Line of Duty series six, episode five… In Sunday’s (18 April) episode, corrupt police officer Jo Davidson (Kelly Macdonald) is seen messaging with an anonymous OCG handler, something she has done in previous episodes.