Season 20
199015 episodes
Episode 3
When Parents Go to Work
June 1, 1990
Episode 6
Environment
June 1, 1990
A major crisis has arisen in the Neighborhood of Make-Believe. Their nearby landfill at Someplace Else has reached the saturation point.
Episode 10
The Environment
April 20, 1990
Mr. McFeely brings a goat into the television house to dispel a few myths. Mrs. Dingleborder and the goats of Northwood complement each other's plans to solve the appalling garbage crisis.
