This story has some unique features among Agatha Christie's books. There's no second murder to help narrow down the suspects, and Poirot must solve the crime in a matter of hours. Even if you've read the story before, this dramatisation is still worth listening to. The sound effects may not be quite movie standard, but they're convincing none the less. The acting is good, and the script writer left the original story alone. And for those of us who can't see, we can follow the story as well as our sighted friends staring at the radio. A pleasant two hours listening.