Miles Mason

From Tardis Wiki, the free Doctor Who reference

Miles Mason was an SSS xenobiologist. He was taken over by the Wirrn, and developed a drug that would mutate those exposed to it into Wirrn. He distributed it in pills to athletes at the 3999 Intergalactic Olympic Games, telling them it would enhance their performance. He assassinated the Duchess of Auckland with a bomb placed under the podium from which she was going to speak. (PROSE: Placebo Effect)