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Frustrated by her lack of progress, Ally (Madlyn Sweeten) wants to give up the piano lessons being administered by her grandmother Marie (Doris Roberts). Hoping to show Ally the value of persistence, Ray decides to resume his own piano studies--again with Marie in charge. If this "solution" were to work without a hitch, Everybody Loves Raymond would have been left without a plotline, so guess what happens. Series costar Doris Roberts has cited "Mozart" as her favorite episode.