Governor (The End of Time)

The governor of Broadfell Prison "replaced" the previous governor. She and the prison guards tried to resurrect, the Prime Minister who had gone missing in 2008. They used the Master's ring, collected from his ashes by Miss Trefusis, resurrection potions and a biometric imprint of him, which came from Lucy Saxon, to do so. They succeeded, but he took the life force of the governor and her associates. (TV: The End of Time)