Theory:Doctor Who television discontinuity and plot holes/The Mark of the Rani


 * No Luddites ever attacked pit machinery, which didn't threaten their livelihoods.
 * But as the Doctor realises in Episode 1, the true Luddites are merely a historical convenience that the Rani is using to cover her tracks. Lord Ravensworth and Luke Ward, who have not had their reason warped by the Rani's experiments and know full well that the pit machinery will not affect anyone's jobs, are bemused by the rage and stupidity of her victims.


 * Lord Ravensworth's amateur botany is the source of the drugs required - is there no local medic?
 * Medic might have been away during this story, Ravensworth could have been taking over until a replacement could arrive.


 * Kew Gardens was not open in the 1820s.
 * They didn't land in Kew Gardens; they were just hoping to land there.


 * Thomas Edison was not born until 1847 (well after the Luddite riots).
 * Are you certain you heard Thomas Edison and not Thomas Telford


 * Would the booby-trapped screen really require the whole of the Rani's TARDIS to power it? Surely she could have found an easier way. She clearly has enough technical know-how. Indeed, why not use a bomb instead?
 * She said her TARDIS was serving a more important job. The "job" no doubt was bait for the trap. (I don't recall any mention of it powering anything.)


 * How does the Doctor's key open the Rani's TARDIS?
 * TARDIS keys may be universal, or it might have something to do with the Doctor's TARDIS having 23 or 24 tumblers, where you have to get the right one or the lock melts.
 * TARDIS keys are explicitly not universal. During his brief tenures as Lord President, he could well have pocketed a cipher ident key, used by the Chancellery Guard to open any TARDIS.  (The Deadly Assassin, The Invasion of Time).