This was really clever - despite the use of (yet again) disguises, although this time I'm inclined to give it a pass because said disguise was so considered and long term. Despite my appreciation for the plot, though, what really entertained me on this one was Poirot fussing with his breakfast eggs, and his bet with Japp (particularly the mournful response). Two little character moments that impress me much more than the rabbiting on about little grey cells, which is basically background noise at the moment because it happens so often.