Dino Coaster is the seventeenth episode of the twentieth season. It was written by Tim Bain.
While Bob and the team complete work on a dinosaur-themed rollercoaster at the Dino Park, Lofty and Dizzy think they’ve broken a precious dinosaur egg – and that a baby dinosaur is now on the loose! They embark on a hunt, which ends in Lofty crashing through the coaster tracks while Leo takes a test run. Wendy steps on the brakes, stopping the zooming car and saves Leo! The machines discover that the egg is not real, but part of the exhibit, and what they thought was a baby dinosaur was really Pilchard.