 Following the suspicions of Roses s ex-boyfriend Mickey, the Doctor and his young companion go undercover as a school teacher and dinner lady in a London high school. With the further help of Mickey their investigations lead them to discover that the schools new headmaster, the charming yet sinister Mr. Finch and his newly appointed members of staff are not of this Earth. This bizarre revelation begins to partly explain why many of the schools pre-pubescent pupils have abnormally high Intelligence. But as the Doctor has just previously discovered. An old friend and traveling companion from his past has crossed his path once again. Her name: Sarah Jane Smith. Together with the help of a now old and rusted robot dog called K-9 that was a gift to her from the Doctor. Sarah strives to help her old time lord friend and his new companions outwit the evil Mr. Finch and his cronies.