This isn't the first time Betty White and George Grizzard appear together on the small screen. The two actors appeared on Password in April 1967.
Dorothy tells Sophia that she drives like Mr. Magoo, a cartoon character created in 1949. Like Sophia, Mr. Magoo's eyesight is impaired.
Betty White and George Grizzard had first shared a scene onscreen 23 years earlier, in 1962's "Advise and Consent".