BBC One’s hit primetime thriller has added Kelly Macdonald to its cast for the new run of episodes, playing DCI Joanne Davidson.
We’re still only two episodes into the sixth series of Line of Duty, but already the fan theories are coming thick and fast.
Line of Duty continues at 9pm on BBC One every Sunday.
Meanwhile, some Line of Duty fans also believe they have guessed the identity of a mysterious voice heard in an audio recording on the phone of murdered journalist Gail Vella.