One Crazy Summoner: Nigel Planter's off to Toadblatt's Summer School of Sorcery, but he needs Billy, Mandy and Grim to teach him about love. | Guess What's Coming To Dinner?: When Billy's parents leave for their second honey moon, Billy is left alone at the worst possible moment, since he has invited Principal Goodvibes over to dinner so he can recommend him into Rollington Academy for the Gifted.