I think the acting us excellent more or less across the board and it’s a big reason why I’m invested.
After tonight’s episode, I think a big problem with it is that they didn’t set up it was Kate enough in the beginning, so that the revelation that it was probably him wasn’t a big enough turn and contrast. There were little points made tonight, even just him saying it was Kate and the order she did things, that I think would have been better off being in an earlier episode.
They certainly jumped the gun with having the funerals so quickly - the detectives hadn’t had the opportunity to be fully convinced it was Kate, or anyone. It felt mawkish to me, a deliberate tug at the heartstrings to show the girls’ funerals.
As for whodunnit and why, I stand by my earlier hunch that although DT/Tom was abusive, there was more going and someone else was responsible for the injections and/or the fire. I still think Jess is suspicious. I hope there’s more edge to her character anyway. I hope we see her and Kate having teamed up in some way in the final episode, with Jess believing Kate about what DT was like.