The Master tells the Tenth Doctor to use his name. (TV: Utopia)
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Master (disambiguation)for other, similarly-named pages.
Master was a title which was claimed by the renegade Time Lord known as the Master, to the point that he asserted it as his name. (TV: Utopia, The Sound of Drums) After regenerating into female form, the Master took the name Missy, short for Mistress. (TV: Dark Water)
The Master regarded the human race, after they had been all but transformed into duplicates of himself, as a master race, literally known as the Master Race. (TV: The End of Time)
While the Thirteenth Doctor was searching for alien spies, "O" openly pondered as to who was their spymaster. In fact, "O" was actually the Master, who was in league with the Kasaavin spies. Revealing that his reference to a spymaster was a clue for the Doctor, the Master identified himself as the "spy... master." (TV: Spyfall)
Time told the Doctor to beware of the forces that massed against her, as well as their Master. Despite the Doctor's prompting, Time did not disclose the identity of their Master. (TV: The Vanquishers)
During the 22nd century Dalek invasion, the Dalek Earthforce maintained that "Daleks are the masters of Earth." While stalling the Supreme Controller, Barbara Wright mentioned an Indian Mutiny, to which the Supreme Controller insisted that the Daleks were the masters of India. (TV: The Dalek Invasion of Earth)
Lazlo, who had been converted into a pig slave, knew the Cult of Skaro as the "Dalek masters". (TV: Evolution of the Daleks)
During the Planetary Relocation Incident, the Supreme Dalek of the New Dalek Empire led his bronze Daleks subordinate in a chant announcing that "Daleks are the masters of Earth." (TV: The Stolen Earth)
The K9 robots commonly addressed their male associates as Master beginning with Professor Frederick Marius, the creator of the original K9 Mark I. When Marius left K9 to the Fourth Doctor, K9 knew him as Master or "Doctor Master", (TV: The Invisible Enemy, The Sun Makers etc.) as did K9 Mark II. (TV: The Ribos Operation, The Pirate Planet etc.) K9 Mark III recognised the Tenth Doctor as his Master, (TV: School Reunion) as did K9 Mark IV. (TV: Journey's End) In addition, K9 Mark IV addressed Clyde Langer as "Master Clyde" (TV: The Mad Woman in the Attic etc.) and Luke Smith as "Master Luke". (TV: The Wedding of Sarah Jane Smith etc.) K9 Mark 2, the regenerated form of K9 Mark I, exclusively addressed Starkey as "Young Master". (TV: Regeneration)
The Dominators claimed themselves to be the "Masters of the Ten Galaxies", (TV: The Dominators) although the claim went unchallenged (PROSE: Mutually Assured Domination) and William Bishop later wondered if it was simply propaganda. (PROSE: The Two Brigadiers)
Master was one of the two social classes of Cerulian society, alongside the Scribes. The Masters incorporated cerulium into bracelets and used them to control the Scribes, which they would use as slaves. Eventually a symbiotic relationship developed between the two; the Master was enchanted by the Scribes, who had no thought but to compliment and assist the Master. They were so amused with one another that they were oblivious to the threat of an incoming asteroid which destroyed their civilisation. (TV: Sirens of Ceres)
Mister Cole was the master of the Hazel Street Workhouse. (TV: The Next Doctor)
As a verb[]
K9 Mark 2 noted that the all-female Ukkan librarians had completely mastered, or rather "mistressed", the art of archiving. (TV: Lost Library of Ukko)