'Hold your whisht': Five things we learned from the first episode of Line Of Duty

The season six opener all felt a bit unrefreshingly familiar for Pat Fitzpatrick, who wasn't very impressed with the early antics of Kelly Macdonald and co  

Adrian Dunbar and Martin Compston in Line Of Duty.

Line of Duty (BBC One Sunday 9pm) finally re-appeared for Season 6, with talk that there might yet be a Season 7 on the cards. If this is all they got, then it might be time to call it a day. Here are five things we learned.

1. Deja Vu: It all felt very familiar as we watched DI Kate Fleming in yet another new police department, at a meeting chaired by DCI Joanne Davidson, Kelly Macdonald to you and me. The official line is that Kate has left AC-12 because she is tired of ‘nicking coppers'.Or is that what the writers want us to believe, and really Kate is deep-undercover, investigating Davidson for deliberate use of an annoying Scottish accent?