Mail from forty years earlier is discovered, and a letter from Homer Simpson's mother's old boyfriend states that he is Homer's true father. Homer sets out to find his supposed new father, leaving Abe behind.

The 17th annual Halloween trilogy. Included: "Married to the Blob," in which a meteor turns Homer into a monster; "You Gotta Know When to Golem," about a monster from Jewish folklore; and "The Day the Earth Looked Stupid," about an alien invasion.