During a meeting, Mr. Haney's first name of Eustace is mentioned.
Lisa makes an chocolate cake by putting milk and eggs directly into the mix box, shaking it, and placing the box in the oven
Sam Drucker says he lost $50 on a previous "Looney Luke" invention: an electric spat buttoner.
Oliver, i.e. Eddie Albert, calls his old college roommate Charlie Williams, i.e. Foster Brooks to seek help on proving or disproving the Milk making machine. In a humorous reversal of his famous intoxicated man routine, Charlie keeps asking Oliver if he is drunk, because of the seemingly absurd statements by Oliver (milk making machine, calling from the top of a telephone pole, becoming a farmer etc).
The same actor who plays Willie the Witcher, i.e. Percy Helton, in Water, Water Everywhere (1966) and Ira Hatch in No Trespassing (1967) also plays Luke Needlinger here. This is his third and final appearance in the series.