What bothers me is that Kaya Scodelario is 27 and is made to look, what, late 30s, and Rufus Sewell is 52. How old are their characters meant to be? Why are they not using actors who are closer to their character's age, especially if they're playing a married couple?
I haven't read the book so I can't compare but it doesn't look very AC to me. Did Sarah Phelps also do the ABC Murders, because that was abysmal. DD and I ended up watching the David Suchet version on ITV2 when it was out a couple of Christmases ago.