In the Cat's Playhouse, Little Cat Z is sick, and Terrence is afraid he'll catch his cold. It's up to the Cat and the Little Cats to show him how to stay healthy. In the Wubbulous World, Horton rescues and takes care of Sid Spider, much to the chagrin of Jane Kangaroo, who thinks that bugs are creepy and not friendly. We also meet Dr. Gazeat, who takes care of everyone in the Kingdom of Didd.