World Enough and Time (TV story)

, written by Steven Moffat, was the eleventh episode of the tenth series of Doctor Who produced by BBC Wales.

The episode marked the return of John Simm as and the first onscreen appearance of more than one incarnation of the Master. It also depicted a version of how the Mondasian Cybermen originated - different origins have been shown in the comics The World Shapers and The Cybermen and the audio story Spare Parts - as well as the Cyberman's first formal appearance since Death in Heaven. It also showed what appeared to be the beginning of the Twelfth Doctor's regeneration, after it had been teased in The Lie of the Land.

Synopsis
The Doctor decides to test how good Missy has become by sending her on a trial run with Bill and Nardole. However, when things go wrong, the Doctor takes over. With Bill trapped in a different time zone, can the Doctor make it to her before it is too late, and who are all those people getting cured?

Plot
The episode opens to the Doctor stumbling from his TARDIS on to a snow filled landscape, repeatedly chanting no as he falls to his knees, beginning to regenerate.

Sometime prior, The Doctor (testing to see if Missy can turn good) drops her, Bill and Nardole off on a colony spaceship facing a black hole in the hopes of saving it. Missy introduces herself as 'Doctor Who' which she claims is The Doctor's real name when The Doctor says it isn't. They are met by a blue skinned humanoid named Jorj who demands to know which one of them is a human. Bill confesses and Jorj shoots her to make sure that the creatures that are on board the ship don't come for her. Figures with bandaged faces in hospital gowns collect her body, and, using a voice synthesiser, claim that they will fix her but shall not return. The Doctor trust them, leaving a psychic message for Bill to wait for him when she awakes.

Jorj threatens the Doctor when he attempts to scan the elevators but is threatened by Missy, who states only she is allowed to kill the Doctor and that it will only make the Doctor cross. Once things settle down, the Doctor explains that due to the lower part of the ship facing away from the black hole the timezone is faster than the one they are in, using a red pen in his Sonic screwdriver to illustrate. He also states that the creatures on board the ship are the descendants of the crew who went to the lower part of the ship when it got dragged towards a black hole and needed to be reversed, as decades have passed for them even though it has only been two days for Jorj. The Doctor then knocks out Jorj using Venusian aikido so that he and the others can follow Bill. Nardole, stating it has been ten minutes for them, wonders how long Bill has been living below, to which the Doctor replies he hopes they aren't too late.

Meanwhile, at the base of the ship, Bill awakes in a hospital ward with a cybernetic heart, too shocked to look at it. A feral caretaker looks at her before running off. Bill eventually clambers to her feet and begins to follow the noise of someone chanting "pain", soon finding it be another patient on the ward. She goes to fiddle with its voice synthesise but has to hide as the feral man and a nurse enter the ward, the nurse turning off the synthesiser. The caretaker, revealed to be called Mr. Razor, takes a liking to Bill and brings her to his room. He explains how time passes really slow for them compared to the top and offers Bill tea. He also shows her a live feed of the upstairs, which Bill then spends her time watching despite its extremely slow pace. Months go by, Bill eventually being put to work cleaning the hospital while plagued by the Doctor's message to keep waiting.

After being there some years, Razor takes her out of the hospital, the floor being called 1056, revealing to her that the patients are being converted in preparation for "Project Exodus" as the humans finite lifespan cannot survive without close proximity to the hospital. After learning of an attempt to leave the hospital failed years ago, Bill's cyber heart fails, forcing them back to the hospital.

More years pass, Bill eventually convincing Razor to take her to the elevators so she can be transferred back upstairs. However, it was revealed to have been a scheme to condemn Bill to a full conversion. The prototype patients restrain her as the surgeon remarks how the headpiece he will fit on her head will inhibit emotion so she won't are for the pain of the process.

Meanwhile, the Doctor, Misy and Nardole make it to the bottom floor, the Doctor having Missy delve into the ship's computer history to find out what has occurred below, annoying Nardole as that tends to be his job. He and the Doctor explore depressed into the hospital, finding a surgery room. Elsewhere, Razor approaches Missy as she researches, the Time Lady threatening to kill him if he comes closer than three feet.

Cast

 * The Doctor - Peter Capaldi
 * Bill - Pearl Mackie
 * Nardole - Matt Lucas
 * - Michelle Gomez
 * / "Razor" - John Simm
 * Jorj - Oliver Lansley
 * Surgeon - Paul Brightwell
 * Nurse - Alison Lintott
 * Voice of the Cybermen - Nicholas Briggs

Crew
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Story notes

 * This episode marks the first on-screen appearence of the original Mondasian Cybermen since the First Doctor television story, The Tenth Planet in 1966.
 * This episode marks the return of John Simm's Master, who last appeared in The End of Time in 2010.
 * This episode marks the first time that more than one incarnation of the Master has appeared on-screen.
 * The Master's line comparing the scenario to being more like a "Genesis of the Cybermen" is a reference to the 1975 Doctor Who story TV: Genesis of the Daleks, which showed the Fourth Doctor being sent to the creation of the Daleks. Following the success of Genesis of the Daleks, a story entitled Genesis of the Cybermen was planned, but never produced.
 * For the first time in the show's history, the Doctor actually self-identifies using the name "Doctor Who". However, it does seem like a bit of an in-joke. He has previously been referred to as such; in The War Machines, WOTAN says "Doctor Who is required" (due to a script mistake), in The Underwater Menace, the Second Doctor signs a note with "Dr. W.", in The Dæmons, the Third Doctor introduces himself as "the great wizard Qui Quae Quod" (Latin variations of "Who").

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Production errors
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Continuity

 * The Doctor notes Missy's use of the TARDIS to retrieve him along with Bill and Nardole from Mars. (TV: Empress of Mars)
 * Bill remarks on how Gallifreyans differentiate gender by calling themselves "Time Lords and Ladies". (TV: Dark Water)
 * Blue-skinned humanoids are seen again. (TV: The End of the World, The Pandorica Opens, Oxygen)
 * The Master adopted the guise of "Razor" so Bill would not recognize him from his time as Prime Minister of the United Kingdom. (TV: The Sound of Drums / The Last of the Time Lords)
 * The Master is sporting a beard, similar in style to his previous incarnations. (TV: Terror of the Autons-Frontier in Space, The Keeper of Traken-Survival) He also shows a love of disguises like his past selves. (TV: Time-Flight, et al)
 * Missy not remembering being on the ship in her previous incarnation is similar to how the Eleventh Doctor didn't remember meeting his other selves until "time caught up". (TV: The Day of the Doctor)
 * The original Mondasian Cybermen appear again and Mondas is shown on a screen, revealing it to be a twin to earth. (TV: The Tenth Planet)
 * The Doctor has been on another space colony that orbited a black hole. (TV: The Impossible Planet / The Satan Pit)
 * The Doctor has to travel to a different time zone of the same location to rescue his companion, but arrives too late. (TV: The Girl Who Waited)
 * Bill's conversion into a Cyberman resembles the alternate Jackie Tyler (TV: Rise of the Cybermen) and Yvonne's conversion. (TV: Doomsday) It also resembles Oswin Oswald's conversion into a Dalek. (TV: Asylum of the Daleks)
 * The Cybermen are shown to be able to cry and feel pain. (TV: Doomsday, Rise of the Cybermen)
 * The Master has allied with Cybermen before. (TV: The Five Doctors, Dark Water / Death in Heaven, PROSE: Birth of a Renegade)
 * The Doctor and Missy each mention how they met at the Academy on Gallifrey and how they chose their names that day, among other promises. (TV: The Sound of Drums, The End of Time)
 * The Doctor knocks out Jorj using Venusian aikido. The fighting style was prominently used by his third incarnation. (TV: Inferno, Colony in Space, The Mutants, The Green Death, The Time Warrior, COMIC: The Celluloid Midas)
 * The Doctor mentions the Master's desire to destroy the universe rather than explore as they initially promised. (TV: Last of the Time Lords, The End of Time)
 * The surgeon explains that the headpiece of the cyber-suit acts as an emotional inhibitor so Bill won't care for the pain. (TV: The Age of Steel)
 * In his fifth incarnation, the Doctor saw the Mondasians who remained on Mondas convert themselves into Cybermen for similar reason. (AUDIO: Spare Parts)
 * Missy previously encountered the "Harold Saxon" Master. (COMIC: The Abominable Showmen / The Five Masters)
 * This is the fourth time the Doctor has witnessed the "genesis" of some form of Cybermen. (TV: Rise of the Cybermen/The Age of Steel, COMIC: The World Shapers, AUDIO: Spare Parts)
 * The Doctor says going on an adventure is something he and Bill do on Saturdays, just as Wednesday used to be his day for adventures with Clara Oswald. (TV: The Bells of Saint John, et al.)
 * The topic of the Doctor's real name is discussed. (TV: The Name of the Doctor) The Doctor again states how he actually likes being called "Doctor Who" (TV: The Bells of Saint John). Missy also claims to know the Doctor's real name; previously, River Song possessed this knowledge (TV: Forest of the Dead, et al.) and Clara Oswald briefly did so before a time reset (TV: Journey to the Centre of the TARDIS).

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