Never very comfortable as a performer despite her success, Livingstone's stage fright became so acute by the time the Benny show was moving toward television that she rarely appeared on the radio show in its final season, 1954–55. When she did appear, the Bennys' adopted daughter, Joan, occasionally acted as a stand-in for her mother, or Mary's lines were read in rehearsals by Jack's script secretary, Jeanette Eyman, while Livingstone's prerecorded lines were played during live broadcasts. Livingstone made few appearances on the television version—mostly in filmed episodes—and finally retired from show Business after her close friend Gracie Allen did so in 1958. Her final performance was as a mouse spoof of herself in The Mouse That Jack Built, a Merrie Melodies cartoon from 1959 lampooning the radio show.