The thing that upsets me about this is how well-done the adaptation is. The screenwriter Sarah Phelps went on to adapt other Christie novels, including "The Pale Horse" (one of my favorites from Christie) and completely butchered it. It still boggles my mind that she was able to get the tone of the book perfect for "And Then There Were None" but then drop the ball on the other equally creepy novel. She had great potential but then went off the rails with other Christie adaptations.