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. It saw the return of John Simm as and depicted the origins of the Mondasian Cybermen. It also showed what appeared to be the beginning of the Twelfth Doctor's regeneration.

Synopsis
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Plot
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Cast

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

Crew
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Story notes

 * This episode marks the first on-screen appearence of the 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

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)
 * 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 Master's teaming up with a different incarnation is strikingly similar to when the Doctor has done likewise. (TV: The Day of the Doctor)
 * The Mondasian Cybermen appear again and Mondas is mentioned. (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 area to rescue his companion, but arrives too late. (TV: The Girl Who Waited)
 * Bill's conversion into a Cyberman resembles 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 on at least one other occasion. (TV: Dark Water/Death in Heaven) He briefly joined them before destroying them in the Death Zone on Gallifrey (TV: The Five Doctors).
 * 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 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 she won't care for the pain. (TV: The Age of Steel)

DVD releases
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Blu-ray releases
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Digital releases
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