Light (Ghost Light)

Light was a member of an alien species who traveled through the universe making a catalogue of life.

Profile
He had taken Nimrod, a Neanderthal race as a specimen. Redvers Fenn-Cooper claimed to have seen a dazzling light while hunting in Africa, he said it had wings and other features similar to that of Light, but it is not proven that this was Light. Light had been asleep for centuries while in his spaceship and while he had, life had been evolving. Josiah Samuel Smith was lights survey run under the auspices of another alien on Light's ship, Control. Josiah changed to mimic the different life on earth and in doing so leaves behind Husks. Light's form depended on his environment and so when he awakes he appeared as a Human in an alien robe who glowed with a yellow light. The Doctor explained to Ace that he moved at the speed of thought. Accordingly, he had the power to teleport.

Light was angry that his catalogue was ruined due to life evolving and so he decided to destroy all organic matter so that it will stop and his catalog will be complete. He killed a maid and took her apart in order to see how her body works. He killed Inspector Mackenzie and turns him into soup and also turned Lady Pritchard and her daughter Gwendoline to stone. When the the Doctor showed Light that Light himself was evolving, realized that he was wrong and was dispersed. (DW: Ghost Light)