Count me as being one who is happy to see no Hastings in this episode. The poor-man's Dr. Watson does nothing for me, as he simply drags down every scene he's in. Japp is often necessary to the story as the representative of officialdom, and a little Miss Lemon is fine for seasoning, but Hastings swings from painfully dim to over-mannered in different episodes. If I have to sit through one more vacuous "Oh, I say there!" I'll take the gas-pipe.

As a general rule, the more Poirot you get in a Poirot story, the better. Every line for Hastings is one taken away from Poirot. And I've never read the books, so I really don't care about fidelity to Christie's characters. A lot of viewers/reviewers seem to have a problem with separating the movies from the books. If you want the book as written, then read it. I don't see the point of watching the television version if you know what will come next at every stage. Theatre is not prose - don't expect a transcription.