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.
Muriel, Eustace, and Courage come home to find out everything is covered in snow. They find the Snowman has returned! He has a blue thumb he uses to freeze things. He puts a huge pole in their house, and it will blot out the sun, making it snow everywhere. He succeeds, but is still sad he doesn't have any of his snow people friends. He says the hole in the Ozone Layer melted them and the North Pole. So Courage goes on a plane and literally sews up the hole in the Ozone Layer! The snow people come back, and the Snowman goes with them, and the snow at Courage's house melts. The Snowman returns home and his friends come back to life.