Millie and the Volcano

S18 E26: Harvey and the new engine Samson are putting the dinosaur models in place for the Earl's new Dinosaur Park. One of the dinosaurs swings towards Millie and gives her a fright. Samson and Harvey laugh, but Millie gets her own back by asking the groundsman to set his bonfire behind the model of the volcano and making them both think it's erupting!