Theory:Doctor Who television discontinuity and plot holes/The Vanquishers


 * One version of the Doctor stays on the station, another appears at the TARDIS as planned, and a third appears on Karvanista's ship because... why? why is there a third and why is the third there of all places?
 * There's a third Doctor simply because she's 'breaking every known law of physics', that's all the answer we need, there could have been 10. Why she appears on Karvistas ship is beyond me, the plot needed her too :/


 * Why are the Sontarans back on Earth at all? With their temporal offensive a failure they have no need of the planet. the only thing they get from there are psychic beings, so why invade the whole planet and go to the trouble of killing al the Lupari? Couldn't they just pick up other, more gifted, psychic people from another planet? There must be other populated planets left over from the Flux.


 * The Daleks and the Cybermen just come as the Sontaran's call?