Not much to add to the other bad reviews - they covered it. The lack of chemistry was the biggest, (why did they make Andrea Riseborough look so awful? Particularly at the first meeting - are we meant to believe that Jack was so bowled over by the harsh bald faced, red lipped look and scraped back hair, that he permanently lost his mind?),
And the rest of it - Jack's poor decision making for a man of science, (I know scientists. I can't imagine any of them making those kinds of choices).
Don't be like the rest of us who kept slogging through this, there are better options on Masterpiece...