Jed Black, MI9's head of training, arrives at St Hope's to get the spies fit and they endure a day of exercise. Meanwhile, a strange newcomer, Luvabitz, arrives in his wurst van and hands out the free, greasy, delicious wursts. The kids and Frank become addicted and simply cannot get enough of them. As a result, they are getting fatter and fatter. Where will it all end?