AnonymityX1000
Veteran
I think this is it. It has to be Hugh Grant because of the street cameras. Hugh was the only one captured by the pics and stayed long enough to kill her. The detective ruled Grace out because she was captured on the camera walking toward and another camera walking past too soon for her to go in there and kill him. And the son and Grace's Dad has yet to be mentioned to be on any street cameras at all. The kid is covering for his Dad to keep the family together.How would it make sense being Grace?
I thought it was the son, but with the reveal of the murder weapon being in his possession, and the reveal of the dad being a sociopath in the same episode, I think it's the dad. They wouldn't blow their load in the penultimate by suggesting it was the son, if it was actually the son.
But I do see how they are playing up the 'Grace is crazy' angle I to would be disappointed if she did it.