A Pocket Full of Rye

S4 E1: Who poisoned wealthy businessman Rex Fortescue? Miss Marple barely has time to ponder this question before her former maid Gladys turns up strangled on the Fortescue estate, a clothes peg stuck on her nose. The murders seem to bear an uncanny resemblance to a child's nursery rhyme. Miss Marple and Inspector Neele uncover clues from the dead man's shadowy past that may reveal a method to the madness.