Eh - this one's more style than substance, I think. I can't get over how none of the party guests realised what date it was, how they were all together again, and what the flowers meant. Especially considering what a shock it must have been for them all several years back, when the inciting event occurred! Are they all morons? Possibly yes. Similarly, if someone tried to murder me, and may well have murdered my sister, I would not be declining to press charges, Pauline. You idiot.

Poirot is the only sensible person at the table.