A woman is being strangled and there is a witness. The police are can not find any evidence. So it is up to Miss Marple with help from Lucy Eyelesbarrow an independent maid.
The story does not totally follow the book yet it has the unmistakable Aunt Jane feel.
Notice how Aunt Jane is always several steps ahead of the others in planning. Watch the expressions when Aunt Jane grates on David Horovitch as Detective Inspector Slack. "...When one of us is clever enough to find the body."
I have seen this movie several times but I never noticed the train scene music until I watched “Brief Encounter - Criterion Collection" (1945) ASIN: 0780023420 Rachmaninoff's Second Piano Concerto. Listen to the type of music during the scene where the two trains pass.
John Hallam has fun playing randy Cedric Crackenthorpe watch him again playing "Lord Rhysart" in "A Morbid Taste for Bones" (1997)