Robin's expression turned from one of awe and excitement to one of worry as the Doctor spoke. She looked out at the children, their faces all so eager... It seemed very strange that there could be anything to do with<em>them</em>in this story. This was the book in which Harry Potter defeated Voldemort for the first time. But in this book, Voldemort was attached to the back of a professor's head... A professor who was conspicuously absent and whose job they had taken.<br/><br/>Trying her best, Robin put on a sunny smile for the kids, turning back around with the Doctor. When the Doctor said not to let her win an argument, Robin gave him a sour look before thinking for a moment. She looked at the students, appearing to think for a moment, before happily grinning at them all.<br/><br/>"No, you're quite right, Hermione," she said brightly. "Rule one in this class: Always let the wife win the arguments." The kids giggled behind their hands as she gave them all a wink. "The first spell we're going to learn is the disarming spell. It's quite simple and can be very useful. All you do is point your wand at your opponent and say, very clearly: 'Expelliarmus!' Why don't you all pair up and give it a try?"<br/><br/>She turned back to the Doctor, dropping the excited look as the students turned to practice.<br/><br/>"Something is wrong. Very wrong. What's happening, Doctor?"