I just watched it now, I had never heard of the case before, and I found it really interesting.
I felt incredibly sad for the daughter- when her granddad said she might prefer her father to get off to still have one parent it really brought home the horror of her circumstances, poor girl.
It is interesting what was said upthread about there not seeming to be enough evidence in the TV show to see why the jury convicted.
I have to say, based on the TV evidence alone, if I was on the jury I WOULD have found him guilty.
I would assume that Dick killed and disposed of her body but that he did not act alone and that Nat was guilty because
(a) of all the odd remarks about how the children would soon forget their mother/ I'll be the first person in the frame for this etc IMO very odd and also
(b) the guy who sold Dick the car said that Nat was there when he delivered it to the farm. Had Nat had nothing to do with the crime of his missing wife he would have told police about the car purchase when they questioned him.
The fact that he didn't suggests to me he knew it had been used to dispose of his wife's body on his orders. This seemed to me to be a real smoking gun.
Like everyone else when his previous convictions were read out I was amazed that he had tried to strangle her 6 weeks prior to this and the jury were not told.
But also, in a way, it did reinforce my respect for the jury system- they didn't know any of that and still found him guilty. To me that seemed like the best ending- a conviction soley on the evidence and not just on susupcions because of what else he'd been up to....quite reassuring really.