Dome of Doom

Eustace is mad they he can't grow plants, so they buy a dome that covers the house. A salesman comes to Courage, Muriel, and Eustace's home to set up dome on top of their house so produce will grow there. When they go outside to pick produce it attacks them and takes over the house. Storms build up inside the dome. Eventually Courage thinks up a plan to destroy the man-eating produce and they end up eating each other. Eustace gets to keep some of it... and the dome is removed.