Agatha Christie originally entitled the manuscript for this novel "Murder in Retrospect." However, in 1942 Dodd, Mead Co. published Christie's novel "Five Little Pigs" in the U.S. with the title "Murder in Retrospect" (it retained its original title in the U.K. publication). She then renamed the story "Cover Her Face" but had to change it yet again, when P.D. James published her début novel in 1962 with that title. The novel itself was written around 1940 as her last novel featuring Miss Marple (around the same time that she was writing "Curtain" which was the last Hercule Poirot); it was published in 1976 after her death.
The director thought the script was much better than the book.
When Gwennie and her husband visit the former housekeeper, Edie, the theme tune to the long running BBC Radio 4 series "The Archers" is playing on the radio. "The Archers" started in 1951 (and is still running in 2019), confirming that this is set either in or after that year.
Esmond Kinight who has a short role as a retired estate agent died shortly after first broadcasting of this serial.
Final film of Sheila Raynor.