Dev Ashton

Dev Ashton was a crew member of the S.S. Pennatillian and helped mine from the star Torajii, not knowing that it was actually an intelligant lifeform. It possesed the captains husband, Korwin McDonnell who wore a welding helmet to stop his know burning eyes from destroying everything. He then possesed Dev to help him kill the crew and he did. The Doctor and Martha Jones managed to help the survuiving crew escape and he became un-possesed.