The eleventh incarnation of The Master, but the first to go by "The Master", this incarnation regenerated from the tenth incarnation of Koschei, who had been killed by Astrel, like many of his other incarnations. In this incarnation, Koschei, rejected his name, calling himself The Master. He became evil at Theta Sigma, for betraying him, and wanted to kill him. This is when The Master first became enemies with Theta Sigma, who would be The Doctor.