 Carl is assigned to guide Richie s class on a tour of the police station. The tour isn t going so well, until a robbery suspect gets free and holds one of the children hostage. Carl makes good on his opportunity to diffuse the situation, and impresses the youngsters. Meanwhile, Myra thinks Urkel and Laura are sneaking around together when they keep mum about their whereabouts ... only to learn they were planning a surprise party for her birthday.