Joan Hickson, who played Miss Marple, was an octogenarian herself and had appeared some years before in "Murder, She Said", in which Margaret Rutherford played Miss Marple.
Joan Hickson, who played Miss Marple, was an octogenarian herself at the time of the series' production. Decades before, she had appeared in a minor role in "Murder, She Said", in which Margaret Rutherford played Miss Marple.