This follows the course of the well produced (though sound staged quality) episodes in this television series, with the story line being in the balance. Christie was so versatile that she could include just about "it all." I can appreciate the irony in this without appreciating the tension created. It was well acted. Not my favorite of her tales, yet appreciate its cleverness and a good ending. I had read this tale among her short stories, and it was one of my least favorites. I appreciate the English for their quality depictions of Christie, drawing eminent actors and the production values of the current day. Frankly, I do not recall any American productions of any period using this particular sound stage method, but so glad to get any Christie adaptation and other English productions. Thanks to BBC and then ITV.