"Picture of an aging man who leads his life, as Thoreau said, 'in quiet desperation.' Because Harmon Gordon is enslaved by a love affair with a wife forty years his junior. Because of this, he runs when he should walk. He surrenders when simple pride dictates a stand. He pines away for the lost morning of his life when he should be enjoying the evening. In short, Mr. Harmon Gordon seeks a fountain of youth, and who's to say he won't find it? This happens to be the Twilight Zone."
Trying to keep up with his younger wife, Harmon convinces his brother to inject him with an experimental youth serum. At first it's effects are amazing, but they continue to work until Harmon is an infant again. His brother gives his wife a choice: walk out with the clothes on her back, or stay and care for Harmon until he is an adult."It happens to be a fact: as one gets older, one does get wiser. If you don't believe it, ask Flora. Ask her any day of the ensuing weeks of her life, as she takes note during the coming years and realizes that the worm has turned - youth has taken over. It's simply the way the calendar crumbles ... in the Twilight Zone."