Miss Marple: Sleeping Murder

A young couple are looking for a home. The wife is from New Zealand and reared by relatives after her parents die. They locate a home and begin to remodel. As they do, the woman begins to feel like she's been there before identifying features of the house that were long ago removed. Most significantly, she suddenly recalls seeing a woman being strangled in the house. A woman named Helen...

This was the last of the Marple mysteries published and (to my mind) thankfully, Christie didn't kill off her detective (as she eventually does with Poirot). But the mystery is nothing special to be honest but the couple is attractive, and as they revisit the past, they stir up a murderer who strikes again and then comes after the young wife (nicely played by Geraldine Alexander) in a fairly suspenseful climax (for a Christie-based film).

P. S. One odd thing about this episode. We briefly meet Miss Marple's nephew Raymond and his wife, Joan (played by Amanda Boxer). For some reason, the writers create unspoken hostility between Joan and Miss Marple. It's never explained and once the mystery gets going it's never referred to again. Puzzling.