The Master is a Time Lord from the planet Gallifrey, just like the Doctor, and as children, they were the best of friends. The Master also left their home planet in a stolen TARDIS but, unlike the Doctor, he preferred to explore the world on an epic scale creating havoc and exposing wickedness. When we first met the Master, he tried to ally with the deadly consciousness of the nesting, the doctor intervened and the plan was aborted but that did not stop the Master from pursuing the doctor during his earthly exile in an ongoing power bid.
All right, the next time the physician met the master was at Gallifrey. His charm had been replaced by a seething malevolence leading the doctor to brand him the quintessence of evil, and he had reached the end of his generation cycle. Eventually, the Master stole another body and started plotting. His plan leaves logopolis destroyed and only the doctor could prevent this disaster from triggering the universe’s end. The fifth, sixth and seventh doctors fought this version of the Master across England’s galaxies in1215 to the far-off world known as “the planet of cheetah people
.” The Master has stolen another new body after fleeing to San Francisco in 1999 and almost managed to use the TARDIS to destroy the earth, but the doctor’s journeys were unhindered and the doctor continued to play a key role in the t. So, fast forward to the planet Malcassairo, where the revived Master disguised himself as the kind-hearted Professor Yana.
And he doesn’t know he was the Master until a tool disguised as a fob watch was opened and his true personality exposed, resulting in the Master Murdering a friend stealing the TARDIS and leaving the doctor dead when the next doctor comes face-to-face with the master he regenerates into Great Britain’s Harold Saxon Prime Minister and tries to destroy any living person and version of himself a “Master Race,” but again the doctor was able to disrupt his plans and the Master was defeated again.
He fought with his next incarnation Missy on numerous occasions, but a big surprise was in store as he was caught on a giant colony ship at the horizon of a black hole The doctor and his companion discovered that the loveable passenger Razor was the master disguised United with Missy, the two masters joined forces to bring the doctor down once and for all, but in the greatest twist so far, Missy stabbed the Master in the back knowing he was about to die and generated Missy The Master shot Missy with his laser screwdriver in the back and that’s where he was