Klytode

From the Aktren Galaxy the Tenth Doctor first encountered the Klytode …

The Doctor defeated the Klytode for a second time when he tried to destroy the Earth by releasing toxic bombs around the worlds weather control centre using a delegation of Klytode Androids sent ahead to Earth. The Klytode was captured on Earth and when he said he would never change his ways until the Earth is destroyed and the Doctor totally humiliated, he was left to be held under lock and key.