Finished this last night, and as someone who thought Nicola Walker never acted but just had annoying mannerism, I wasn't bothered by her not being in it. But put off by new lead as she had that strange hair style to an actress in another series which is meant to look all sophisticated or something but actually looks like someone with dirty hair that needs a good comb. (Sorry sounds very trivial)
And was never that taken with Sunny ... so why did I watch?
Well as someone said up thread for the plotting and the team working out how all the links fitted together.
And how easy it was to go down the wrong route. So that was the part that the social worker played. What looked like suspicious behaviour in terms of the crime they were solving, was because of his criminal behaviour. (I kept thinking what's Poldark doing in Paris!!) And of course helped Sunny's character seem even more out of step with his partner by being on Eurostar whilst she is having a miscarriage.
I thought the actor who played Jay was really good at being unlikeable, but also sympathetic. Almost want a whole new series to show what happens to him and his grandma now they have found each other, but have a new secret to cover up. ie false evidence against the evil upper class tory.
I thought Martine Laird was brilliant. Again on one level really unlikeable (and lucky to have such a loyal partner) but thought she conveyed how her whole live had been blighted not only by her family, but not being able to get justice because of her race and sex, and living with the fact that her daughter hated her.
And agree that maybe this series it was a bit too heavy handed with the social messaging, but that is really what the series have always been hasn't it? A vehicle to expose the social injustices of the past, that led to some people disappearing and only being found years later by accident.
Was there ever a plot line where say for instance in a moment of carelessness a driver killed a pedestrian, and hid the body. ie no politics, just about how a member of the public not only did a bad thing, but then tried to cover it up?
(I am wrong in remember as Cassie also having to deal with a husband she felt estranged from, or rather that he felt there was no place in her life as work took precedent?)