S06E02 - La folie de Greenshaw

Miss Marple is given the responsibility of hiding a young mother and son from danger, so she takes them to the sprawling Greenshaw's Folly, owned by an old friend and botanist who is the last surviving member of the Greenshaw family. But the spinster sleuth soon has second thoughts about her decision when bad things start happening. First the Folly's butler dies in an apparent accident. Then a guest staying there vanishes without a word. Everything culminates in the brutal murder of Miss Greenshaw herself, and Miss Marple is left with a myriad of secrets and suspects to sift through.