Halfway through this episode, I was prepared to give it an 8/10 for the location shooting and witty dialogue alone. On the one hand, the shots of the sunset and the harbor (with Greece substituting for Alexandria) actually rivaled the shots in the previous episode (see my review of "Triangle at Rhodes"). And on the other hand, the writers not only borrowed some of Christie's best lines from the original story, but added some good ones of their own; when Hastings, in Egypt, is posing for a photo in safari costume on a cardboard camel, and the photographer asks him to look brave, Hastings gives it his best effort, and Poirot, looking on, says, "No, Hastings, now you merely look constipated." But I changed the review to a 9/10 with the surprisingly poignant ending, highlighted by the acting of Ann Firbush. Considering that for most of the previous hour, the passengers on the Mediterranean cruise didn't seem awfully broken up by the murder of a very unpleasant woman, I was impressed by how the revelation of the murderer caused things to take such a serious turn.