Aunt Clara's mistake is the explanation for the great Northeast blackout that had occurred one year before this show aired on November 9, 1965.
In a perfect example of "If the story requires it, there it is," this is the first time (but not the last) a piano appears in the Stephens home.
No explanation is given for what happened to Aunt Clara's previous boyfriend, Hedley Partridge played by Charles Ruggles, who appeared in Aunt Clara's Old Flame (1965). The character of Ocky, played by Reginald Owen, reappears in Mc Tavish (1968).
The title is a takeoff on 'The Short Happy Life of Francis Macomber', also known as The Macomber Affair (1947), by Ernest Hemingway.
Darrin wonders if Aunt Clara failed the National Drivers Test. This a reference to a TV program of the time. The National Drivers Test was an award-winning May 1965 documentary television special in the United States on CBS hosted by Walter Cronkite and Mike Wallace, with follow-up tests in 1966 and 1967.