Per the title, when Marie Antoinette was reported to have been told that the French peasants had no bread, she replied "Then let them eat cake."
First of two appearances by Leah Waggner, the real-life wife of William Schallert. They were married for 66 years (1949-2015). Her second appearance in the series comes in the second season: Little Brother Is Watching You (1965).
Soon after appearing in this episode, his only appearance in the series, George S. Irving lent his voice in a recurring role as narrator to the animated series Underdog (1964).
This is Margaret Hamilton's second of two appearances in the series, playing the same role in each. She has spoken lines in this episode. In her earlier episode, Double Date (1963), she appears, but does not speak.