Mystery novelist Agatha Christie's intrepid spinster sleuth, Miss Marple, goes from dissenting jury member to actress in a seedy theatre troupe in her investigation of a Murder Most Foul.
Miss Marple (Academy Award winner Margaret Rutherford) causes a mistrial when she remains the sole juror opposing a guilty verdict for Harold Taylor in the murder of his landlady. Rather than settle for a new trial, Marple investigates. And when the clues lead her to believe that the landlady was blackmailing someone in a rundown theatre company, she auditions for a part. But the killer strikes again as the curtain goes up. Now, can the spinster sleuth identify the murderer before he claims his next intended victim--Mrs. Marple herself?
Based on the novel Mrs. McGinty's Dead by Agatha Christie