Other have done a fine job of evaluating this episode. My two cent's worth has to do with the creativity of the murders, the nice pairing of Barnaby and Scott in the wine cellar, faced with literally carving their way out (and not being missed by anyone). The murder victims are crass and unkind people and seem deserving of their fates. Of course, the mechanics of their demises is a bit far fetched. How someone could put together the incredible machinery and have it work so successfully is hard to fathom. But, then, that is how the gauntlet is thrown down. It would seem that someone so adept at accomplishing these results would take a bit more care when it comes to being caught. This is about gamesmanship and this is not an terribly unusual plot element throughout moviedom. I have to say I was taken in and the writing is fine here. I also enjoyed Barnaby's wife having the time of her life without him. It should give him pause.