Editing World Enough and Time (TV story)

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{{Infobox Story
|image           = Missy, the Master and cyber-converted Bill.jpg
|series          = [[Doctor Who television stories|''Doctor Who'' television stories]]
|season number   = Series 10 (Doctor Who)
|series episode number = 11
|story number    = 274a
|doctor          = Twelfth Doctor
|companions      = [[Nardole]], [[Bill Potts|Bill]]
|featuring       =  {{Gomez}}
|enemy           = [[Cybermen]], [[Mondasian]]s, {{Simm|n=Razor}}
|setting         = [[Mondas]]ian [[Colony ship (World Enough and Time)|colony ship]]: [[Floor 0000]] and [[Floor 1056]]
|writer          = [[Steven Moffat]]
|director        = [[Rachel Talalay]]
|producer        = [[Peter Bennett]]
|broadcast date  = [[24 June (releases)|24 June]] [[2017 (releases)|2017]]
|network         = [[BBC One]]
|format          = 1x45 minute episode
|prev            = The Eaters of Light (TV story)
|next            = The Doctor Falls (TV story) 
|made prev       = Empress of Mars (TV story)
|made next       = The Doctor Falls (TV story)
|trailer         = World Enough And Time Trailer - Doctor Who Series 10 - BBC
|trailer2        = World Enough And Time - Next Time Trailer - Doctor Who Series 10 - BBC
|clip            = "Hello, I'm Doctor Who!" - World Enough And Time Preview - Doctor Who Series 10 - BBC
|clip2           = The Master Meets Missy World Enough and Time Doctor Who
|clip3           = 
|bts             = Missy Maximum Risk! - Doctor Who Series 10
|bts2            = Steven Moffat Introduces World Enough And Time - Doctor Who Series 10
|bts3            = Pearl Loses Her Patients - Doctor Who Series 10
}}{{you may|World Enough and Time (audio story)|n1=the River Song audio story}}
'''''World Enough and Time''''' was the eleventh episode of [[Series 10 (Doctor Who)|series 10]] of ''[[Doctor Who]]''.

The episode concluded the ongoing [[Vault (The Pilot)|vault]] story [[story arc|arc]], with the Doctor taking {{Gomez}} on her first adventure and entrusting her with his two [[companion]]s in an experiment to test how good she has become. It also showed [[Bill Potts]] being converted into a [[Cyberman (Mondas)|Cyberman]] and displayed what appeared to be the beginning of the [[Twelfth Doctor]]'s [[regeneration]].

''World Enough and Time'' notably featured the return of [[John Simm]] as {{Simm}}, seven years after his last appearance in ''[[The End of Time (TV story)|The End of Time]]'', marking the first time a previous actor of the Master had returned to the television series after being recasted. The episode also showed John Simm's Master acting alongside [[Michelle Gomez]]'s Missy, marking the first onscreen appearance of more than one incarnation of the Master.

It also marked the return of the Cybermen in their original design for the first time since they were introduced in [[1966]] in ''[[The Tenth Planet (TV story)|The Tenth Planet]]'', and their first formal appearance since ''[[Death in Heaven (TV story)|Death in Heaven]]''. The episode depicted a fourth alternative account of the [[Genesis of the Cybermen|genesis]] of the Mondasian Cybermen - different origins have been shown in the comics ''[[The World Shapers (comic story)|The World Shapers]]'' and ''[[The Cybermen (comic story)|The Cybermen]]'', and the audio story ''[[Spare Parts (audio story)|Spare Parts]]''.

== Synopsis ==
The Doctor decides to test how good Missy has become by sending her on a trial run with [[Bill Potts|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 ==
[[File:The_Twelfth_Doctor_starts_to_regenerate.jpg|thumb|The Doctor regenerating.]]
The Doctor stumbles from [[the Doctor's TARDIS|his TARDIS]] onto a [[snow]]-filled landscape, repeatedly chanting no as he falls to his knees. He begins to [[regenerate]].

Sometime prior, while walking through [[St Luke's courtyard|the courtyard]] at [[St Luke's University]], the Doctor decides to test if Missy can turn good, despite Bill's objections. They discuss it further in [[St Luke's kitchen]], Bill claims even Nardole will resist, but the Doctor assures he won't as he agreed "in his head", Nardole sheepishly agreeing. Their short dispute causes the Doctor to become emotional, due to Missy being the closest thing he has to someone else like him, something that amuses Nardole, who takes a selfie with him to chronicle the moment. Later that day, Bill and the Doctor eat together, the latter convincing her it is a good thing to let Missy try to prove herself as she was once his "man crush". After a brief discussion about the Time Lords and gender stereotypes, Bill confesses that Missy truly scares her. The Doctor tries to promise he can ensure Bill won't die but admits it can't be guaranteed. Regardless, he assures her that he will be there should things get out of hand.

The plan set, the Doctor drops Missy, Bill and Nardole off on a [[Colony ship (World Enough and Time)|colony spaceship]] facing a black hole in the hopes of saving it. Missy introduces herself as 'Doctor Who' to the cameras, which she claims is the Doctor's real name despite the Doctor denying such. He soon becomes impatient with their progress, walking around the TARDIS eating crisps. Missy finally follows suit by deducing why a distress call was made. She also mocks Nardole and Bill's roles as "comic relief" and "exposition" given their genders. They are soon met by a blue-skinned humanoid named [[Jorj]] who demands to know which one of them is a human. Bill confesses, the Doctor exiting the TARDIS, taking charge as Jorj prepares to shoot Bill as creatures at the [[Floor 1056|bottom of the ship]] begin to come up in the elevators. Despite the Doctor's pleas, Jorj shoots Bill in the chest, mortally wounding her. [[Patient (World Enough and Time)|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 trusts them, leaving a psychic message for Bill to wait for him when she awakes.

[[File:Bridge_on_Floor_0000_on_Mondasian_colony_ship.jpg|thumb|left|The [[TARDIS]] lands on a colony ship.]]
Jorj threatens the Doctor when he attempts to scan the elevators but is threatened by Missy with her umbrella, 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 being further away from the black hole, time moves faster than the one they are in, the [[Floor 0000|top floor]], noting how lifts slowed down when they neared the top due to the difference in gravitational pull, using a red [[marker pen|pen]] in [[the Doctor's sonic screwdriver|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. Jorj admits his confusion; the Doctor mocks him for his lack of knowledge despite supposedly going to "space school", causing the man to reveal he is only a janitor. 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 (World Enough and Time)|hospital]] ward with a cybernetic heart fused into her chest, too shocked to look at it. A feral caretaker looks at her before running off. Coming to her senses, she briefly sees a vision of the Doctor telling her to wait for him only for him to vision. She observes the room, noticing two clocks on the wall, one for floor 1056 - which registers 365034 days, 23 minutes, and 26 seconds, or 999.430015 years - and another for floor 0000, which indicates 2 days, 10 hours, 45 minutes, and 17 seconds.

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 (World Enough and Time)|nurse]] enter the ward, the nurse mutes 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 faster for them compared to the top, using a tin can to illustrate, and offers Bill tea. He explains how Bill was hurt on the upper levels so had to have her heart replaced with a "shiny" cyber heart and that she has been at the hospital for a few months. 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 witnessing how the Doctor raised his eyebrow for a week and braced to explain the situation to his associates. While waiting, Bill recovers enough that she is eventually put to work cleaning the hospital by the nurse while plagued by the Doctor's message to keep waiting.

[[File:Line_of_patients_(WEAT).jpg|thumb|The [[Patient (World Enough and Time)|patients]] on [[floor 1056]].]]
On one particular day, she contemplates leaving the hospital only for it to alarm the other patients on the ward, unnerving her enough to stay. After being there just over a year, she eventually convinces Razor to take her out of the hospital, where he reveals to her that the patients are being converted in preparation for "[[Operation Exodus]]" as the humans' finite [[lifespan]] cannot survive the journey back up to the top. They witness how the dying residents are guided to the hospital by the partially upgraded. After a while, 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. They sneak in, Razor revealing he has a key to the conversion theatre, wearing a mask in skit attempt to disguise himself. However, once inside, it was revealed to have been a scheme to condemn Bill to a full conversion as (according to the [[Surgeon (World Enough and Time)|surgeon]]) people usually scream if alerted to the real reason why they are taken into the theatre. The prototype patients in the room restrain her as the surgeon remarks how the headpiece he will fit on her head will [[Emotional inhibitor|inhibit emotion]] so she won't care about the pain of the process.

Meanwhile, the Doctor, Missy 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 deeper into the hospital, finding a surgery room. The Doctor uses his sonic to activate the light above the bed, Nardole jumping in surprise at there being partially converted patients in the room. Elsewhere, Razor approaches Missy as she researches, the Time Lady threatening to kill him if he comes closer than three feet.

[[File:Cyber-converted_Bill.jpg|thumb|left|[[Twelfth Doctor|The Doctor]] discovers he is too late to save [[Bill Potts|Bill]].]]
The others eventually learn of "Operation Exodus", while Missy simultaneously learns the ship came from the planet [[Mondas]], [[twin planet]] of Earth. Razor teases her again, drawing a pistol, agitating Missy enough to confront him directly, but he discards the weapon. Razor states that he is "worried about his future" and is surprised Missy can't remember being on the ship beforehand. He talks to Missy about his love of disguises, wondering if she still likes them, revealing "Mr Razor" was an invention so that Bill did not recognise him as a former prime minister of Britain. He removes his mask, revealing himself as {{Simm}}, in his "Harold Saxon" [[incarnation]], now sporting a beard and grey hair. He greets his future self, smiles and says "give us a kiss".

In the surgery room, the Doctor opens a door, revealing a complete Mondasian [[Cyberman (Mondas)|Cyberman]]. Backing away, he confirms he means no harm and asks for Bill's location. To his horror, the Cyberman asserts that it is Bill. Missy and her predecessor enter, the latter surprising the Doctor as they profess they have made "the [[genesis of the Cybermen]]". Nardole runs away in fear, as the Doctor looks on in horror; his trial to test Missy's goodness has just been turned upside down in more ways than one. Not only has Missy reverted to her cruel self, the old Master is here too. Bill reaches towards the Doctor, stating "I waited. I waited for you..." as she begins to cry beneath the mask.

== Cast ==
* [[Twelfth Doctor|The Doctor]] - [[Peter Capaldi]]
* [[Bill Potts|Bill]] - [[Pearl Mackie]]
* [[Nardole]] - [[Matt Lucas]]
* {{Gomez}} - [[Michelle Gomez]]
* {{Simm|c}}<!-- "Razor" is not in credits --> - [[John Simm]]
* [[Jorj]] - [[Oliver Lansley]]
* [[Surgeon (World Enough and Time)|Surgeon]] - [[Paul Brightwell]]
* [[Nurse (World Enough and Time)|Nurse]] - [[Alison Lintott]]
* Voice of the [[Cyberman (Mondas)|Cybermen]] - [[Nicholas Briggs]]

== Crew ==
''to be added''

== References ==
=== Locations ===
* After being taken by a group of [[Patient (World Enough and Time)|Patients]], Bill is moved from [[Floor 0000]] to [[Floor 1056]].
* Bill is taken to the [[Conversion Theatre]] to be fully [[Cyber-conversion|converted]].
* Razor says that once there was an expedition to [[Floor 0507]], the largest of the [[solar farm]]s, but they didn't survive the trip.

=== Cybermen ===
* The [[Patient (World Enough and Time)|Patients]] are [[Cyber-conversion|partially-converted]] [[Cyberman (Mondas)|Cybermen]].
* The headpiece is revealed to be the [[Cyberman (Mondas)|Mondasian Cybermen]]'s [[emotional inhibitor]].
* The Patients use [[speech synthesizer computer]]s to talk.
* The Cybermen are part of a [[neural net]].

=== Science ===
* The ship is reversing away from the [[gravitational pull]] of a [[black hole]].
* Due to [[time dilation]], [[time]] is slower on one end of the ship than on the other. The Doctor calls it [[Superman]]-gravity.

=== Biology ===
* The Doctor calls the [[heart]] the "most important [human] organ".
* The Doctor notes that humans only have one heart.
* The Doctor says he has hidden arms.

=== Technology ===
* Missy reveals she has a [[sonic umbrella]].
* [[The Doctor's sonic screwdriver]] can be used as a [[marker pen]].
* The ship is fitted with [[inertia lift]]s.
* The ship is 400 [[mile]]s long and a hundred miles wide.
* The ship has [[CCTV]] [[camera]]s.
* Missy, Nardole and Bill wear [[earpiece]]s to communicate with the Doctor inside the TARDIS.
* The ship's [[thruster]]s are on reverse.
* Razor says that on most people, the [[Cyber heart]] looks like a [[vending machine]].
* The surgeon uses a machine called [[Medi-Ject 08]] to operate on the Patients.

=== TARDIS ===
* The individual [[TARDIS console panel|panels]] on the [[TARDIS control console|console]] can be taken off and moved around the entire [[TARDIS control room|control room]], having a long [[TARDIS console cable|cable]] connected to it.

=== Species ===
* According to Missy, it's offensive to mistake [[Time Lord]]s for [[human]]s.

=== People ===
* In his [[first incarnation]], the Doctor had a "man [[crush]]" on [[the Master]], while at [[Time Lord Academy|the Academy]].
* Missy comes up with other words to describe her [[companion]]s, including "assistants", "[[pet]]s", "snacks" and "disposables".
* Missy thinks "fear" is the emotion called [[spanking]].
* Jorj is the colony ship [[janitor]].

==== Nicknames and aliases ====
* Missy uses the alias "Doctor Who" and gives Bill and Nardole the nicknames "Thing One" and "the Other One" respectively. Missy claims that the Doctor's real name is "Doctor Who".
* Missy calls Bill "[[exposition]]" and Nardole "[[comic relief]]", referring to two types of stock characters typically found in story writing. She calls them their [[gender]]s.
* Missy calls Jorj her [[stallion]].
* Missy calls Jorj "[[Smurf]]".

=== Culture ===
* Missy briefly [[dabbing|dabs]].
* According to the Doctor, Time Lords don't have fixation on [[gender]] and [[gender role]]s that humans do.
* Nardole takes a [[selfie]] with the Doctor.
* The [[creation of the Cybermen]] is called "[[Operation Exodus]]".

=== Foods and beverages ===
* The Doctor eats a packet of [[crisp]]s labelled [[Bamon crisps]].
* Attempting to mimic human [[flirt]]ing, Missy says to Jorj "if I'm in the [[shower]], just bring me some [[beans on toast]]".
* Bill puts chipped [[potato]]es in a [[fryer]].
* [[Pepper]]s and [[cabbage]]s are seen in the University kitchen.
* The Doctor and Bill eat [[chips]].
* Bill eats a [[bacon sandwich]]. The Doctor tells her to "go and tell a [[pig]] about [her] moral high ground".
* Nardole eats a [[Jaffa Cake]].
* Razor makes [[tea]] for Bill.
* Razor uses a can of [[baked bean]]s to illustrate the ship.
* Razor is cooking [[bacon]].
* Missy suggests to make a [[soup]] out of Razor's vital [[Organ (anatomy)|organs]].

=== Music ===
* [[Opera]] music can be heard from the Conversion Theatre.

== Story notes ==
[[File:Brian Minchin Talks World Enough And Time - The Aftershow - Doctor Who The Fan Show|thumb|This episode's ''Aftershow'' on ''[[Doctor Who: The Fan Show]]''.]]
* This episode marks the first on-screen appearance of the original design of the [[Cyberman (Mondas)|Mondasian Cybermen]] since the [[First Doctor]] television story, ''[[The Tenth Planet (TV story)|The Tenth Planet]]'' in 1966.
* This episode marks the return of [[John Simm]]'s {{Simm|n=Master}}, who last appeared in ''[[The End of Time (TV story)|The End of Time]]'' in 2010.
* This episode marks the first time that more than one incarnation of [[the Master]] has appeared on-screen together.
* 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 ''[[Genesis of the Daleks (TV story)|Genesis of the Daleks]]'', which showed the [[Fourth Doctor]] being sent to the creation of the [[Dalek]]s. Following the success of ''Genesis of the Daleks'', a story entitled ''[[Genesis of the Cybermen (TV story)|Genesis of the Cybermen]]'' was planned, but never produced (although this is just one of many later stories to take up the concept, a full list of which can be found at [[Genesis of the Cybermen]]). It is also a play on [[Operation Exodus]] and the biblical books of Exodus and Genesis. Perhaps coincidentally, [[Doctor Who Magazine]] had previously published a trilogy of stories entitled ''[[Exodus (comic story)|Exodus]]''/''[[Revelation! (comic story)|Revelation!]]''/''[[Genesis! (comic story)|Genesis!]]'', which also featured the [[Cyberman|Cybermen]]. Also, ''[[Genesis of the Daleks (TV story)|Genesis]]'' and ''[[Revelation of the Daleks (TV story)|Revelation]]'' (but not Exodus) have been used as titles in the '...of the Daleks' formula.
* For the first time in the show's history (but far from without precedent across the franchise), the Doctor actually [[Aliases of the Doctor|self-identifies]] using the name "[[The Question|Doctor Who]]". He has previously been referred to as such: in ''[[The War Machines (TV story)|The War Machines]]'', [[WOTAN]] says "Doctor Who is required" due to a script mistake; in ''[[The Highlanders (TV story)|The Highlanders]]'', the [[Second Doctor]] introduces himself as "Doktor von Wer" ([[German language|German]] for "Doctor [of] Who"); in ''[[The Underwater Menace (TV story)|The Underwater Menace]]'', the Second Doctor signs a note with "Dr. W."; in ''[[The Dæmons (TV story)|The Dæmons]]'', the [[Third Doctor]] is introduced as "the great wizard Qui Quae Quod" ([[Latin]] variations of "Who"); from ''[[Doctor Who and the Silurians (TV story)|Doctor Who and the Silurians]]'' to ''[[The Five Doctors (TV story)|The Five Doctors]]'', the Doctor's [[car]] [[Bessie]]'s plate read ''[[WHO 1]]'', in ''[[Battlefield (TV story)|Battlefield]]'' it read ''[[WHO 7]]'', and in ''[[The Dying Days (novel)|The Dying Days]]'' it read ''[[WHO 8]]''; in ''[[The Kingmaker (audio story)|The Kingmaker]]'', the [[Fourth Doctor]] wrote a series of children's books accidentally published as ''[[Doctor Who Discovers]]''; in ''[[Rose (TV story)|Rose]]'', a website called ''[[whoisdoctorwho.co.uk]]'' asks "Who is Doctor Who?"; and in ''[[Fogbound (comic story)|Fogbound]]'', {{Delgado}} addresses a [[postcard]] to the Third Doctor as "Dr. Who". Although Missy claims that "Doctor Who" is the Doctor's real name, she also explicitly says she calls herself Doctor Who to head off the usual response heard when the Doctor introduces himself and people reply, "Doctor who?". She also states that he chose the name himself, suggesting she means "real name" in the sense of self-designation. 
* "[[Operation Exodus]]" was a continual concern for the inhabitants of Moonbase ''Alpha'' in the 1970s TV series ''Space: 1999''. There, it was an evacuation plan for an orderly transfer of the Moon's inhabitants to another location--originally back to Earth but eventually adapted to any habitable body.
* When the Master unmasks himself, an alarm bell in the background sounds in time with [[The Drumming|a drumbeat]]. The drumbeat is also heard when he enters the operating theatre alongside Missy. The Master has had an association with drums before in [[TV]]: ''[[Utopia (TV story)|Utopia]]'', ''[[The Sound of Drums (TV story)|The Sound of Drums]]'', ''[[Last of the Time Lords (TV story)|Last of the Time Lords]]'' and ''[[The End of Time (TV story)|The End of Time]]''.

=== Ratings ===
* 3.37 million (UK Overnight figures)
* 5.01 million (UK final)<ref>[http://guide.doctorwhonews.net/info.php?detail=ratings&type=date Ratings DW]</ref>

=== Filming locations ===
* Scenes [[Floor 1056|outside the hospital]] were shot in [[Cardiff Bay]].

=== Production errors ===
{{Discontinuity}}
''to be added''

== Continuity ==
* The Doctor detaches a panels of the TARDIS console from the main structure. ([[TV]]: ''[[Journey to the Centre of the TARDIS (TV story)|Journey to the Centre of the TARDIS]]'', ''[[Flatline (TV story)|Flatline]]'')
* Missy dances to the [[alarm]] sound. She previously danced to the continued "EXTERMINATE" chant from the [[Supreme Dalek (The Magician's Apprentice)|Supreme Dalek]]. ([[TV]]: ''[[The Witch's Familiar (TV story)|The Witch's Familiar]]'')
* The Doctor notes Missy's use of [[The Doctor's TARDIS|the TARDIS]] to retrieve him along with Bill and Nardole from [[Mars]]. ([[TV]]: ''[[Empress of Mars (TV story)|Empress of Mars]]'')
* Bill is working in the [[St Luke's kitchen|kitchen]] at [[St Luke's University]]. ([[TV]]: ''[[The Pilot (TV story)|The Pilot]]'')
* The Doctor again complains about humans only having one heart. ([[TV]]: ''[[The Shakespeare Code (TV story)|The Shakespeare Code]]'', ''[[The Power of Three (TV story)|The Power of Three]]'')
* The Doctor and Bill eat chips together. The [[Ninth Doctor]] and [[Rose Tyler]] previously did this. ([[TV]]: ''[[The End of the World (TV story)|The End of the World]]'') The [[Tenth Doctor]], [[Martha Jones]] and [[Jack Harkness]] also ate chips together and talked about the Time Lords. ([[TV]]: ''[[The Sound of Drums (TV story)|The Sound of Drums]]'')
* The original [[Mondasian Cybermen]] appear again, and [[Mondas]] is shown on a screen. Missy notes that it's a [[twin planet|twin]] to [[Earth]]. ([[TV]]: ''[[The Tenth Planet (TV story)|The Tenth Planet]]'') In his [[Fifth Doctor|fifth incarnation]], the Doctor saw the [[Mondasian]]s who remained on [[Mondas]] convert themselves into Cybermen for a similar reason as the colony ship. ([[AUDIO]]: ''[[Spare Parts (audio story)|Spare Parts]]'')
* Nardole screams due to being surprised, as his virtual self was. ([[TV]]: ''[[Extremis (TV story)|Extremis]]'')
* The Doctor has to travel to a different [[time zone]] of the same location to rescue his companion, who waits for him, but he arrives too late. ([[TV]]: ''[[The Girl Who Waited (TV story)|The Girl Who Waited]]'')
* The topic of the Doctor's "real name" is discussed. ([[TV]]: ''[[The Name of the Doctor (TV story)|The Name of the Doctor]]'') The Doctor again states how he actually likes being asked "[[The Question|Doctor Who]]". ([[TV]]: ''[[The Bells of Saint John (TV story)|The Bells of Saint John]]'')
* The Doctor says going on an adventure is something he and Bill do on [[Saturday]]s, just as [[Wednesday]] used to be his day for adventures with [[Clara Oswald]]. ([[TV]]: ''[[Nightmare in Silver (TV story)|Nightmare in Silver]]'')
* The Doctor refers to him and the Master meeting at the [[Time Lord Academy]]. ([[PROSE]]: ''[[Divided Loyalties (novel)|Divided Loyalties]]'')
* The [[Surgeon (World Enough and Time)|surgeon]] explains that the headpiece of the cyber-suit acts as an [[emotional inhibitor]] so Bill won't care about the [[pain]]. ([[TV]]: ''[[The Age of Steel (TV story)|The Age of Steel]]'')
* Once again, the Doctor witnesses a companion suffer a mortal injury, ([[TV]]: ''[[Face the Raven (TV story)|Face the Raven]]'') only for technology to be used to arrange for them to stay alive; in both cases, their hearts no longer function. ([[TV]]: ''[[Hell Bent (TV story)|Hell Bent]]'')
* The Master adopted the guise of "[[Aliases of the Master#Razor|Razor]]" so Bill would not recognise him from his time as [[Prime Minister of the United Kingdom]]. ([[TV]]: ''[[The Sound of Drums (TV story)|The Sound of Drums]]'')
* Missy comically remarks on the age gap between the Doctor and his companions. The [[Dream Lord]] made a similar remark. ([[TV]]: ''[[Amy's Choice (TV story)|Amy's Choice]]'')
* The Doctor criticizes Bill for eating a bacon sandwich when arguing about Missy's morality. This echoes an earlier conservation between the two. ([[TV]]: ''[[The Pilot (TV story)|The Pilot]]'')

== Home video releases ==
=== DVD releases ===
This episode was released as part of the Series 10 DVD box set on [[13 November (releases)|13 November]] [[2017 (releases)|2017]].

=== Blu-ray releases ===
''to be added''

=== Digital releases ===
''to be added''

== External links ==
{{bbc.co.uk|b08wx21f}}

==Footnotes==
{{Reflist}}

{{DWTV}}
{{Master stories}}
{{Cyberman stories}}
{{Regeneration stories}}
{{TitleSort}}
{{cat|Doctor Who (2005) television stories}}


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[[Category:Series 10 (Doctor Who) stories]]
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[[Category:Stories set in Bristol]]
[[Category:Stories set in the 2010s]]
[[Category:Regeneration television stories]]
[[Category:2017 television stories]]
[[Category:Stories set in Antarctica]]
[[Category:Stories set in 1986]]
[[Category:Cyberman television stories]]