|Other names:|| Professor Yana|
|Actor:|| Roger Delgado|
William Hughes (child)
The Master was one of the most evil and corrupt beings that the Time Lords ever produced. His crimes were without number and his villainy without end.
The Master made many attempts to destroy Earth by assisting other races in their conquest of th planet. He helped the Nestenes, the Axons, and the Dæmons to try and control Earth, but all were stopped by the Dcotor.
In 2008, he allowed Toclafane through to this time from the year 100,000,000,000,000, attempting to create an empire with him and his wife, Lucy Saxon, as the rulers. When time was reversed and the Toclafane sent back to their home time, Lucy, who the Master had abused, killed him. Since the Doctor planned to keep him from doing harm by keeping him in the TARDIS, the Master refused to regenerate and died.
- The Master on the TARDIS Data Core