Milo (School Reunion)

Milo was a studious boy at Deffry Vale High School. Due to eating chips cooked in Krillitane oil as part of a Krillitane plot to unlock the Skasis Paradigm, he knew much more than he should have done, which was demonstrated when the Tenth Doctor gave him a complex pop quiz. Milo was replaced by Melissa in the "top class" after he "failed" Mr Wagner. (TV: School Reunion)

Behind the scenes

 * In deleted material, the Doctor's pop quiz caused Milo to collapse and be brought to the nurse, who ate him, as she was a Krillitane in disguise.