Michael Hart
From Tardis Wiki, the free Doctor Who reference
Michael Hart was a Vardan in charge of the Mediasphere. He was planning an invasion of Earth and used Teddy Baxtar to help in their plans and to allow the Vardan's back on the Mediasphere. The First Doctor told him that as Teddy saw his future if they killed him they would be trapped in a time bubble. (AUDIO: The Vardan Invasion of Mirth)