Doctor Who (2005 - Present): School Reunion

Mr. Finch, the headmaster of Deffry Vale School, has been changing the school to improve the students' performance; his changes include free lunches with special chips. The Doctor, under the alias "John Smith", is undercover as a science teacher in the school and is shocked by the uncommon intelligence of the students. His companion, Rose Tyler, is working undercover in the school's canteen. Both the Doctor and Rose relate the mysterious events around the school to the chips: Rose observes that the chip oil has an adverse effect on the other kitchen staff, while the Doctor notes that the chips themselves are making children more intelligent.