Harry and His Bucket Full of Dinosaurs Season 2 Episode 1 What's Thunder? Episode Title:What's Thunder?.Episode Description:Stuck indoors watching a lightning storm from his bedroom window, Harry wonders what exactly causes thunder and lightning to happen, and decides to visit Dino World to find out. Harry and the dinos encounter some mischievous characters, Mr Thunder and Mrs Lightning, who despite Harry's desperate attempts to calm them down, just seem to enjoy making noise too much. The gang decide that since they can't beat them, then they may as well join them. Harry and the dinos win the battle of the noise and return triumphantly home to eat Nana's cookies.