A kid plays the old novelty song "Purple People Eater" and the creature actually appears. The two then proceed to help an elderly couple who are being evicted by their greedy landlord.

Karate action and laughs never cease when a brother and sister go to California to visit their uncle. They soon discover that he's an alcoholic on the run from the Mob who want him to pay up or else...

Albert Quinn Ingalls wants to be a doctor. But soon he discovers that he is fatally ill. He decides to spend the rest of his life in Walnut Grove. Meanwhile children from school are preparing for their traditional climbing of the mountain.