The title is based on the nursery rhyme "Mary Had a Little Lamb."
Two of this episode's young guest stars, Karyn Kupcinet and Bobby Buntrock (after this appearance becoming a regular on the sitcom Hazel (1961)), would each die in their early 20s of unnatural causes--Kupcinet of an apparent homicide at age 22 on November 28, 1963 and Buntrock about a decade later in a car accident at age 21 on April 7, 1974.