The Witch ' s Familiar ( TV story ) It probed the reason why the Doctor had fled from Gallifrey and gave a needed explanation as to why Skaro had returned after it was shown to be destroyed in " Remembrance of the Daleks " . It also divulged how had escaped her death in " Death in Heaven " , using the same technique to allow herself and Clara to survive the cliffhanger of the previous episode . Missy also continues the Master ' s infamous ability to escape a certain death . However , the next time she appears would be in " Extremis " two years later , revealing she survived the Daleks . This story was further notable for exploring several new narratives with Davros . For the first time , Davros was seen outside his chair , revealing both a lack of legs and Dalek technology hooking him into the chair . Davros also opened his own eyes for the first time on - screen , and the possibility of him dying an indisputable death - - as well as him regretting his actions - - was brought up . This story was also the first to show Davros cry , as well as sharing a moment where he and the Doctor genuinely find something funny and laugh together . On the other hand , it was also the first time Davros and the Master encountered each other on - screen and had any interaction . In that same respect , the mechanics of a Dalek were given an in - depth look , specifically how they control their casing functions , their weaponry and the filtering of their speech . It also gave an explanation for why they often shout " Exterminate ! " . In addition , it introduced the sonic sunglasses to replace the sonic screwdriver . The Twelfth Doctor would acquire a new screwdriver in " Hell Bent " , and from then on he would utilise both devices . Synopsis . The Doctor is trapped in the place that is the nightmare of all Time Lords : Skaro , the home planet of the Daleks . Forced to keep Davros company , the Doctor will be tempted by the dying madman to trying to do something for the greater good of the universe ; however , is this really what Davros had intended , or does he have something else up his sleeve ? Elsewhere , the Doctor ' s best friend and Clara Oswald are figuring out how to rescue him . Plot . On the outskirts of the Dalek City , Clara awakens to find herself suspended upside down in the air by rope and Missy sharpening a stick nearby . Missy tells her they ' ll probably have to hunt for food , hence the stick , Clara asks if that ' s the case , why is she tied up ; Missy retorts with a mischievous wink " in case there ' s nothing to hunt " . Clara is left confused as she ' s sure the Daleks killed them . Deciding it will help them pass the time , Missy begins revealing how she managed to save the both of them from being killed by the Daleks . Missy thinks about to how the Doctor once faced 40 invisible Android Assassin s without a TARDIS or companion , just his sonic screwdriver and a teleport device - " in short , the Doctor happy . " As she can ' t remember which Doctor had this adventure ( as they ' re all the same person to her ) , she decides to put the Twelfth Doctor in it . At the moment that the androids fired on him , the Doctor used siphoned energy from the blasts to power the teleporter and escape . Clara is left impressed with the trick ; the androids think the Doctor ' s dead and he escapes . However , Missy then points out this is the Doctor they ' re talking about ; he ' s not that lucky . The Doctor fell into a nest of vampire monkey s soon after " but that ' s another story ! " Clara immediately realises that Missy copied what the Doctor did back when she attacked with the Cyber - converted deceased ; Missy used the energy from the Brigadier ' s attack to teleport away . To save them from being being exterminated , Missy repeated the process ; since their manipulators were linked , it was an easy task . However , it would seem that the Daleks have a bit more energy in their blasts than Cybermen , as doing this has fried their manipulators to useless wrist accessories . Without them or a TARDIS , they are left stranded on Skaro . Missy frees Clara from her restraint ( albeit painfully for Clara ) and both stare at the city ; Missy states that standing between them and the Doctor is everything that the greatest empire in the universe can throw at them , but they have a pointy stick . She asks Clara where they start ; Clara tells Missy it starts by believing that they can win . Laughing , Missy agrees to go along with her idea , but starts she was feeling a bit hungry . They walk off , with Clara asking if she can have a stick ; Missy tells her to make her own . Meanwhile , the Doctor searches the infirmary and finds a gunstick , grabs it and threatens Davros , aiming directly behind his head . Davros tells him it ' s ancient and inoperable ; the Doctor quickly repairs the device , proving Davros wrong . The Doctor tells Davros to " get out " ; Davros explains that he cannot leave . Increasingly angry , the Doctor yells for him to get out again . The Daleks see Davros ' signal leaving the infirmary ; he calls for the Daleks to aid him . The Supreme Dalek orders that assistance be given , telling Davros to go back . However , Davros tells all Daleks to find the escaping Doctor . The Supreme Dalek orders the Doctor ' s capture , as Davros ' signal arrives right outside of the command centre . Told to admit their creator , the Daleks beginning opening the door , which shows Davros ' chair . A Dalek checks the infirmary , finding Davros on the ground , yelling for Sarff . Sarff slithers in to aid his master . The door finishes opening , revealing the Doctor pulled Davros out of his chair and took it for himself . Riding into the room of surprised Daleks , the Doctor tells them to admit to having " this exact nightmare . " The Daleks attempt exterminating the Doctor , but find him unharmed . Even more strange , is the Doctor is enjoying a cup of tea . He tells them " I ' m the Doctor , just accept it . " The Doctor explains " Davros is an insane , paranoid scientist who has survived centuries around trigger - happy mini tanks " , and thus has a personal force - field to keep them from killing him . Amused , the Doctor says he ' s keeping the chair . Threatening the Supreme Dalek with a gunstick , he asks if any Dalek is brave enough to admit Clara is dead ; if she ' s not , she ' s to be brought to him . Davros appears on the monitor , telling the Doctor that it ' s good to see him learn ; that this desire for conquest is an improvement in his character . The Doctor taunts Davros , asking how he is , as he ' s not getting his chair back as it ' s taken . Davros smirks , saying that the chair is indeed taken by someone else ; just not the Doctor . At that moment snakes emerge from the chair , causing the Doctor to lose grip on the gunstick ; Colony Sarff has left agents wherever Davros needs them . The snakes wrap completely around the Doctor , causing him to pass out from a lack of oxygen . Meanwhile , Missy and Clara are standing in another area on the outskirts of the City . After having heard the Doctor ' s call for Clara , they enter a Dalek sewers . In an attempt to find out how deep it is , Missy pushes Clara down into it , and the landing knocks her unconscious . Clara reawakens to find Missy standing in front of her , then grabs her stick and threatens her . However , Missy reclaims her stick and enters the main sewer area , explaining that all the " nasty stuff " they see on the walls are old decaying and angry Daleks that have been left to rot and liquefy . Missy soon cuffs Clara to a security camera , which spots her and sends a Dalek to collect her . As a Dalek approaches , Missy attacks it , using her brooch to poke holes in the casing , allowing the old Daleks to enter it and kill the new Dalek as revenge . Back in the infirmary , the Doctor awakens to find Davros back in his chair . Davros tells him to be grateful and should feel privileged as this item was not easy to procure : the only other chair on Skaro . The Doctor quickly picks himself up , but Davros advises him not to try leaving again as the room has been sealed shut . Unbeknownst to the Doctor , Colony Sarff is hidden amongst the tubes of Davros ' life - support . Examining the life - support system , the Doctor is able to deduce its function . Davros is " vampiring " off the Daleks ; so long as the Daleks ' hearts beat , so does Davros ' . The Daleks allow this because of the one flaw Davros couldn ' t get rid of in them : respect for the one who gave them life . Davros shows the Doctor that Colony Sarff confiscated the confession dial and sunglasses ; the Doctor quickly takes his sunglasses , saying they are one of the few things that matter to him . Davros points out the Doctor still plays the part of the fool , which the Doctor says should still make Davros nervous . Davros asks why the Doctor came ; the Doctor explains that he came because a sick man asked him to . Wondering what the Doctor has confessed , Davros asks to be gifted with such knowledge before he dies ; the Doctor points out Davros keeps claiming to dying soon , but never ends up doing so . " Give it some welly ' the Doctor retorts . Davros wonders why the Doctor left Gallifrey , to which they argue ; the Doctor was bored there , but is homesick . The Doctor then wonders how Skaro came back , which Davros explains was due to the Daleks wanting a homeland ; the Doctor points out that was actually Davros ' longing for Skaro , which is in the Daleks ' DNA . Amused , Davros points out that while his home and children are alive , the Time lords and Gallifrey were forever lost in the Time War . However , the Doctor explains that he saved Gallifrey , and it ' s safe from the both of them , somewhere out there . Surprised , Davros asks if it ' s true ; once it ' s confirmed , Davros congratulates the Doctor . Confused , the Doctor asks why . Davros tells him that a man should have a people , a species , an allegiance ; . Darvos notes that he failed to save the Kaleds . He tells the Doctor , if he has truly redeemed the Time Lords from the fire , he should hold onto them . Even if it means taking the darkest path through the harshest hell , the Doctor must ensure the Time Lords live . Davros asks to see the Doctor ' s face . The Doctor tells him he ' s seen it enough ; however , Davros says he wishes to see it with his own eyes , shutting off the implant in his forehead and opening his true eyes . Showing genuine fragility , Davros asks the Doctor a tough question : was he a good man , was he right to create the Daleks ? The Doctor realises Davros is indeed dying , telling him he did doubt it . Davros tells him they have confirmed only one thing ; the Doctor is not a very good doctor . Both genuinely laugh at the Doctor ' s failure to see this . In the sewer , Missy pulls the now - dead Dalek mutant out of its casing ; she has Clara sit in the armour and sticks the telepathic circuits into her temples before sealing her inside ; nano - tech heals the wounds . Clara learns whatever she says is spoken by the shell , something she finds weird ; however , her own voice can ' t be heard outside of the shell . Amusing herself , Missy has Clara attempt saying her name , but gets " I am a Dalek " instead ; she then has Clara try to say " you are different from me " and " I love you " , but they come out as " exterminate " . She then has Clara say " exterminate " , causing the shell to spin and fire rapidly ; Missy laughs as Clara exerts more control . Missy explains that unlike the Cybermen , who cut out their emotions , the Daleks harness it to fire their weapons , and reload by saying " exterminate . " Now understanding how the Dalek shell works , Clara heads back into the hospital with Missy . They are confronted by a Dalek , which questions Clara as to why an intruder in the city hasn ' t been exterminated yet . As Clara isn ' t able to think of a good excuse , Missy takes control of the situation , explaining that she ' s a Time Lady , and thus a prisoner of value ; she tells the Dalek to inform the Supreme Dalek had better be informed that " the bitch is back " . Back in the infirmary , the Doctor connects Davros ' chair to the life support system , and maxing out the life it can give the ancient scientist . Davros wonders why the Doctor is helping him , to which he hears the Doctor is doing something for the little boy he abandoned . Reflecting on the past , Davros says he wishes he and the Doctor had been on the same side ; smiling , the Doctor tells Davros they ' re on the same side now . Davros says all he wants is to see one last sunrise , but cannot open his eyes now . As the sun looms on the horizon , the Doctor asks Davros " not to tell anyone that I did this " as his hand starts to glow with regenerative energy . Commenting that what he ' s about to do will " probably cost me an arm or a leg somewhere down the line " , or just result in him being smaller in one of his future incarnations , the Doctor approaches Davros ' life support as Davros chuckles softly behind him . Grabbing one of the tubes with his glowing hand , the Doctor prepares to donate a tiny bit of regenerative energy to revive Davros long enough to see the sunrise . However , the moment he touches the life - support , Sarff binds him to the cables , and the machinery begins to drain more energy from the Doctor , transmitting it to the Daleks , renewing them . Davros laughs , commenting that regenerative energy is " The ancient magic of the Time Lords " , and remarking that he thought he would have to vivisect the Doctor to take it from him . He gloats the Doctor ' s compassion drove him to open his veins willingly , allowing all Daleks to " Drink the blood of Gallifrey . " In the Daleks ' command room , Missy walks up to the Supreme Dalek , calling it her " special favourite " and not to tell anyone . The Supreme Dalek declares her to be an enemy of the Daleks , but Missy pokes fun of its logic ; the Daleks considered anyone who isn ' t one of them to be an enemy , so that was an easy guess . Missy offers to reveal where Clara Oswald is , to which the Daleks chant for her to reveal her information ; Missy refuses , dancing to their chanting . Suddenly , all the Daleks freeze , with their casings seeming to shut down . Missy wonders if this was because she was boring them . Missy reacts with horror as the regenerative energy stolen from the Doctor begins leaking from their casings . Telling Clara that she needs to find the Doctor , Missy runs off to find Davros ' room . In the infirmary , Davros asks if the Doctor ' s true reason for leaving Gallifrey was because of a prophecy concerning the creation of a Dalek / Time Lord hybrid that he may now be the catalyst for . Before Davros can pursue this line of inquiry any further Missy breaks in and zaps Colony Sarff with a gunstick , killing it . The Doctor is freed , though it is unclear if any of his remaining regenerations were consumed by Davros ' attempt to harness his energy . Seeing Missy is alive , the Doctor knows it means Clara is . Insulted , Missy tells him she ' s fine too . Elsewhere , the Daleks reactivate , gloating that they have been renewed , and begin chanting praise for Davros ' experiment succeeding . Davros gloats the Daleks have gained new strength , and that his own life has been prolonged ; however , the Doctor pays no mind to him , reclaiming his confession dial as he counts down from three . Missy recognises the Doctor ' s face , wondering what her friend has done this time . At " one " , the city begins shaking ; Davros wonders what ' s happening . The Doctor has two words for him " Moron " and " Sewers " . Missy begins laughing . The Doctor has used Davros ' own plan against him ; the regenerative energy Davros used to renew the Daleks was also distributed through the sewers beneath the city , and the decaying Daleks within have awoken " very cross " and started attacking the city . The Doctor sets off to find Clara , and Missy follows after informing Davros that it was a pleasure to finally meet him ; she reaches to shake his hand . Instead , Missy pokes his eye implant , and runs off after the Doctor , laughing . In the hall , Clara finds them , but cannot tell the Doctor that she ' s inside the Dalek shell , due to it not speaking what she wants . Missy lies , saying that Clara was killed by the Dalek casing in front of them , trying to goad the Doctor into using a gunstick to kill it ; the Daleks are going to die anyway , so what ' s one Dalek dying to the Doctor ? All Clara ' s attempts to tell the Doctor her identity come out " I am a Dalek " and " I am your enemy " ; Missy says that " the Dalek " appears to be insanely gloating . Seeing the gunstick not firing , the Doctor asks the Dalek why it hasn ' t killed him . Begging the Doctor not to kill her , Clara causes the casing to say " I . . . show . . . mercy " ; the Doctor lowers the gun and tells her to open the casing just by thinking the word . The casing opens to reveal Clara , who was crying from fear . The Doctor glares at Missy for trying to trick him into killing Clara and tells her to run . Missy explains this is a metaphor as to why she gave Clara to the Doctor - to see the friend inside the enemy and vice versa . Reminding Missy to run after she concludes that " Everyone ' s a bit of both ; everyone ' s a " hybrid . " " , the Doctor is told that it was always him who ran ; the Doctor begins helping Clara out . Continuing to run through the collapsing building , Missy is caught by the Daleks , but tells them that she has an idea . After freeing Clara of the Dalek casing , they head back to where the TARDIS was destroyed . The Supreme Dalek demands to know what ' s happening , to which the Doctor says " your sewers are revolt ing . " The Doctor then reveals that the HADS broke apart the TARDIS to save it ; all it will take to repair is using the sonic . Clara is surprised to hear this , noting she hasn ' t seen his screwdriver . The Doctor tells Clara he ' s over screwdrivers , putting on his new wearable technology , the sonic sunglasses . Activating them , the Doctor taunts the Daleks as he and Clara are sealed inside of the rebuilt TARDIS to flee The TARDIS has materialised on a nearby hillside outside the Dalek city and the Doctor and Clara are standing watching the city as it suffers damage . The Doctor wonders why the Dalek shell was able to say " mercy " . He then realises what he must do . He returns to young Davros , shooting the Handmine s with a Dalek gun , telling him it doesn ' t matter what side anyone ' s on so long as there ' s mercy . He then begins guiding Davros back home . Home video releases . DVD releases . " The Witch ' s Familiar " was released on DVD as part of " Doctor Who : Series 9 , Part 1 " on November 2 in region 2 and November 3 in region 1 . Blu - ray releases . " to be added "