Location: Deffry Vale High School, London, England, Earth Date: 2007 Enemies: The Krillitanes There are strange goings-on at a comprehensive school - UFOs, over-intelligent children, and odd-tasting school dinners. This attracts the attention... (more) of the Tenth Doctor, Rose and Mickey Smith, as well as a couple of old friends…

Anthony Head, Benjamin Smith, Caroline Berry, Clem Tibber, Elisabeth Sladen, Eugene Washington, Heather Cameron, Joe Pickley, John Leeson, Lucinda Dryzek, Noel Clarke, Rod Arthur