Hastings feels the wrath of an anti-corruption enquiry into his conduct.
This is a good finish to the fifth season with some great performances.
The plot is enjoyable and gives several characters the opportunity to shine. I think the main draw is writing, staging and acting of the interrogation scenes. "As you well know" Line of Duty produces strong drama out of this type of character exchange and this one has the benefit of using Adrian Dunbar to great effect along with Anna Maxwell Martin.
At this point in the show we have seen a lot of this type of drama before so it feels quite by-the-numbers. You know all will seem lost before some piece of evidence pulls it out of the fire. As for the characters, there aren't many left now who haven't either been locked up or both sides of the interrogation desk.
Series 5 started out very well but for me lost a bit of momentum after the best character was killed off. Overall it is solid entertainment.