The Master


 * ''This article is about the renegade Time Lord known as "The Master." For other uses of the term "Master", see Master (disambiguation).

"I am the Master and you will obey me."

- The Master

The Master, once known as Koschei and by various temporary aliases and pseudonyms, was a renegade Time Lord, who the Doctor opposed many times. On at least one occasion, he threatened the existence of the universe itself. Borusa called him, "one of the most evil and corrupt beings the Time Lord race ever produced." (DW: The Five Doctors)

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