Theory:Doctor Who television discontinuity and plot holes/Fugitive of the Judoon


 * How is it murder if you sabotage a weapon somebody is going to use to kill you so it kills them instead when they use it to try to kill you?
 * That is not a discontinuity point nor a plot hole.


 * Wasn't there a previous episode where the tardis couldn't handle flying with two doctors at the same time?
 * If this is a pre-Hartnell Doctor, then perhaps this is a different TARDIS which Doctor Ruth chose to put in this shape.


 * If the Fugitive Doctor is a pre-Hartnell incarnation, why does she already have a TARDIS stuck as a police box? It can't be the same faulty TARDIS the First Doctor would go on to steal?
 * Whilst you are utterly correct this isn’t technically a discontinuity point for this episode. It is not suggested that the Fugitive Doctor is pre-Hartnell here, only that she doesn’t recall being 13
 * Actually, that IS suggested. All the Doctors, including Hartnell and all his successors, had some form of the sonic screwdriver. Doctor Ruth, however, did not know about the sonic. This means she is at least pre-Hartnell. Due to the Timeless Child retcon, we have multiple forms of this Time Lord, before Hartnell. Perhaps there were Doctors before Hartnell, all of whom did the same thing, meaning rescuing people and being a Doctor. The Time Lords wiped their mind after 12 regenerations, but the Timeless Child always grew up to Become the Doctor, taking up the same name. This will explain the name of Doctor Ruth, but not about the TARDIS. Let's see what happens.
 * This is just speculation but recall that in The Doctor's Wife, the TARDIS indicated that it does not perceive time in a strictly linear fashion. So perhaps it knew that the Doctor would prefer the police box exterior in the future and took that form to please the Doctor, unaware that (as far as the Doctor was concerned) it had no discernible reason for looking like that yet.


 * Ruth Doctor here mentioned parking two identical TARDISes close together would lead to 'temporal feedback' (I suspect it's not a good thing), but there's a scene in the Day Of the Doctor, in the Gallery, clearing showing 3 identical TARDISes parked literally next to each other, with no effects whatsoever.


 * Day of the Doctor was already one of the biggest temporal events the Doctor or the TARDIS have ever been a part of. It's entirely possible that there was temporal feedback, it's just that it's effects may not have been particularly visible, nor may the Doctors have cared all to much at that moment.