Plot hole: Jessica concludes that the widow is the killer because she was planning to try on a new dress at the same time she was supposedly about to flee to Italy. Her intention to travel abroad had been revealed only during a private family meeting and was never made public. One could assume that someone might have passed this information on to Jessica, but from the viewer's perspective, it functions as a straightforward deus ex machina, with no narrative setup or justification.
Sacha
6th Feb 2026