The Man with the Yellow Hat explains what spiders are and what their webs are. George mimics a spider web, building one of his own and the web helps catches blown away postcards.
Beakman explains the scientific characteristics of spiders and they aren't insects. He shows some clips of spiders up close spinning webs and explains how strong spider webs are. Beakman shows how to capture your own spider web on paper.
Johnny is trapped with Carl and several others in an isolated dome where they have replicated various biomes found on Earth, such as swamps and tundras. Carl shows Johnny the characteristics of each biome and the types of organisms present in them. He also briefly discusses how the areas combined maintains a healthy ecosystem.
Hank discusses how ecologists believe in conservation and how the government has also made efforts to support conservation. Hank further discusses the strides made by modern ecologists in the ecology field.