Paine

 was a work unit created by the Eleven. He worked in the power generation plant aboard his stellar manipulator. He was to do it for the rest of his life, a period equivalent to a single day. He was injured whilst working, prompting the Orbs to prepare to terminate him. However, the Eighth Doctor intervened, saving him and gaining his aid in defeating the Eleven. Later, he gave his life freeing Liv Chenka and Helen Sinclair from imprisonment, allowing them to save his people. (AUDIO: The Satanic Mill)