Ted, I have to agree with you. (well...there haven't been many times when I haven't agreed with The Grand Maestro! )
And when you talk about that particular scene, and how they both know the jig is up, and that both of them realize that it is an open book as far as who committed the murder..and the bit about the whole 'game' thing...you have truly hit the nail on the head. It was a fanciful and fun scene, and I enjoy it tremendously.
I also agree that the ending was a bit lackluster...I mean, where the heck did that come from? But I enjoy this episode so very much. It is fun and playful, and I have a secret crush on William Shatner!