Theory:Doctor Who television discontinuity and plot holes/Revelation of the Daleks


 * Davros and his Daleks recognised the Doctor. When the Renegade Daleks come to take Davros, he tells them to take the Doctor instead, but the Doctor's image does not compute with their known appearance of the Doctor.
 * Renegade Daleks and Imperial Daleks possibly don't share the same knowledge or Renegade Daleks simply didn't believe Davros. 
 * Many fans see Davros' Daleks in this episode as Necros Daleks as it was before the Dalek Civil War [War Of The Daleks by John Peel] but also Davros mentions in the episode that he himself planned for the Doctor to come so he must of known of his appearance, were the Renegade Daleks did not.."
 * The Big Finish Productions Audio Drama Davros provides an explanation for Davros' recognition of the Doctor, and since Davros recongnises the Doctor then the Necros Daleks, created after the audio, were probably programmed to recognise him too.


 * Why doesn't Bostock die the first time he is exterminated?
 * A Dalek's gun can paralyze, too.


 * How exactly does the fake head of Davros work, and what's the point of it?
 * Probably to fool people (especially assassins) into thinking he was crippled and weak, an easy target.


 * How is Davros still alive? He clearly succumbed to the Movellan Virus in Resurrection of the Daleks and died, so he couldn't have gotten to an escape pod as he says in this episode.
 * In Destiny of the Daleks we learnt that Davros has a secondary life support system that enabled him to survive a direct blast from a Dalek in Genesis. Agree though that Davros's continued survival is implausible and tiresome.
 * Assuming Davros to be part-Dalek in some ways, perhaps the virus just caused him temporary sickness while whatever was left of his Kaled immune system eventually fought it off.


 * Why do the Renegade Daleks bother to take Davros back to Skaro to 'stand trial' instead of simply exterminating him on the spot? Since when have Daleks observed Due Process?
 * They intend to make a spectacle of him to the whole of the Dalek race for propaganda purposes, or else Davros is in possession of certain useful information they wish to extract. Alternately, perhaps these are the same strain of more progressive Daleks who would later try and (apparently) execute the Master for his crimes (see Doctor Who). Additionally, we've seen before that Davros can survive being exterminated, so the trial might also be an excuse for the Renegade Daleks to devise a more permanent way of killing him.
 * In The Witch's Familiar it was established that the Daleks have a genetic weakness toward their creator. This would explain the desire for a trial, whatever that implies for a Dalek. Davros would likely not be killed but put under 'house arrest'.


 * Would the Renegade Daleks really take the risk of leaving a man who might be the Doctor, their greatest enemy, alive simply because his physical appearance doesn't match their records of him, especially when they know full well this is perfectly mutable?
 * Being only a small incursion force, they have a limited supply of time/ammunition, or else, being so unimaginative, are constrained merely to adhere to the mission directive of capturing Davros they were dispatched with.


 * When the Renegade Daleks encounter Davros, why does the Imperial Dalek run off?
 * There are several reasons why it might have done this, one is, perhaps one of the Renegades telepathically ordered it do, and with his leader captured, the Imperial decided to do it. Or perhaps it decided to escape while it can, where it went is a mystery though...


 * Why does Davros lure the Doctor across the galaxy to drop a polystyrene statue full of fake blood onto him?
 * Davros was hardly sane when we first saw him. And it's quite clear that his insanity has rapidly degenerated since.
 * Davros has a wicked sense of humour and was bord?


 * If she'd thought a moment, Peri would surely have realised that the Doctor couldn't possibly be killed on this visit, since the grave must already have had a body in it.
 * Maybe but her character isn't known for being level-headed in crisis.


 * Davros does make some mention of turning the Doctor into a Dalek, but why not just capture him the instant he arrives?
 * Presumably down to his own arrogance, Davros wants to lead the Doctor on, so he can feel the satisfaction of defeating him both physically and mentally.


 * When captured, how does the Doctor know that Davros is still alive? (Natasha and Grigory can't possibly have told him, because they don't know either.)
 * After facing Davros three times now, the Doctor recognises Davros's style. After all how many people are their in the universe, brilliant and insane enough to pull this off, then set up the whole thing just to taunt the doctor?


 * Tasambeker stabs Jobel without pushing the plunger on the syringe.
 * She doesn't need to. It's not the fluid that kills Jobel but the piercing of the syringe into a vital organ.


 * If Davros is aware of everything that goes on at Tranquil Repose by means of monitors and spies, how is it that he is unaware that Takis has sent for daleks from Skaro?
 * One can only assume Takis got "lucky" enough to get a signal through at such a time as Davros was distracted (either in cheerfully experimenting on / torturing Stengos and co, threatening his business associates, or seething at the DJ). Or perhaps for a while he considered Takis to be lowly enough to not merit surveillance, though either way he would probably deem it unlikely that anyone could be so suicidal as to make a 9-1-1 call to Skaro (and the Doctor certainly finds it incredulous).


 * In a strikingly out-of-character moment, when the Skaro Daleks storm in upon Davros' sanctum, the last surviving white Dalek (in the background) quietly slinks away to safety.