If you've ever played 20 Questions before, you kind of get the idea of how this goes. A persons thinks of something (in this case it has to be WD related) and the other members ask questions to try and figure out what the person is thinking of. Once someone is reasonably sure of what the person is thinking of they can guess. If they are wrong, it counts as a question. You only get 8 questions to figure it out. (We've tested it out and you don't need 20 questions to do this game!)
Best of luck.
Right now I'm thinking of something related to WD. Start asking questions that can help you find the answer (eg Is it in the TV Series?)