Governor (The End of Time)
From Tardis Wiki, the free Doctor Who reference
The governor of Broadfell Prison "replaced" the old governor. She and the prison guards tried to resurrect Mr Saxon, 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)
