In the first of our videos answering viewer questions, we deal with something that's long overdue... The names and jobs of the scientists who appear in our 300-odd videos. Plenty more questions and answers to come. See our videos at http://www.periodicvideos.com/ Featured in this video are Martyn Poliakoff (The Professor), Pete Licence, Samantha Tang, Debbie Kays, Steve Liddle, John Moses, Rob Stockman and Darren Walsh.