 As in other TV comedy shows, a laugh track was added to "sweeten" the soundtrack, as when the studio audience missed some close-up comedy because of cameras or microphones obstructing their view.Television viewers became accustomed to live without Mary Livingstone, who was afflicted by a striking case of stage fright that didn't lessen even after performing with Benny for 20 years.Hence, Livingstone appeared rarely if at all on the television show.