The license plate on the Munsters' car is shown to be HAJ302.
Herman's cry of "Coming, Mother!" when J. R. and Alfred tell him his mother is calling to him from the other room is a nod to the popular radio teenage situation comedy "Henry Aldrich," which ran from 1939 to 1953. The show began with Mrs. Aldrich calling, "Hen-ree, Henry Aldrich!" to which Henry would reply, "Coming, Mother!"