 The next day, Lloyd immediately starts working on a machine with the opposite effect so he can return Danny to his 14-year-old self.Meanwhile, Danny visits the high school to pursue Miss Noble.When he arrives, he is promptly mistaken for the school's new principal, Harold Forndexter, who should have arrived to take up his position that morning (the real Forndexter (Alan Thicke) has been delayed, but due to a miscommunication the school was not informed.)