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.

He soon 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. 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. The Doctor then knocks out Jorj so that he and the others can follow Bill.

Cast

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

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.

Ratings
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Filming locations
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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)
 * Blue-skinned humanoids are seen again. (TV: The End of the World, 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.
 * 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. (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.
 * 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)

DVD releases
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Blu-ray releases
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Digital releases
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