The first thing I need to complain about is the cinematography. For some reason the film is presented in a letterbox format, so we have black bars above and below the picture. The other thing, certainly in the first episode, is that many of the scenes are made in darkness. Maybe it's intentional, but it really makes it hard to see what's going on. Not well lit.
So far as the acting is concerned, as usual, Michael Sheen inhabits the character of Andrew very well. Not a nice man, we're led to believe.
Emily Maitlis, played by Ruth Wilson, is also believable, though we don't really get an in-depth understanding of her character. She also has adopted a weird kind of accent, a cross between Miranda Hart and Maggie Thatcher.