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


 * So how does tossing the Skovox Blitzer out of the TARDIS to float in the depths of space and slowly die fit into the Doctor's "I know that you shouldn't be on this planet but I can help you with that" earlier statement, and, in fact, his general ethos? Shouldn't he at least have tried to return it home? Or give it new Orders to be a good flower pot or ATM, at least?
 * The Blitzer seems to be less a sentient thing and more a machine/weapon. To leave it deactivated and floating harmless in an isolated part of space seems a reasonable course of action. His earlier offer to "help" it was a last ditch attempt to reason with it when his original plan to toss it into the time vortex had been unwittingly foiled by Danny.


 * Why is there a chess board and pieces right next to a set of double doors?
 * How do the Doctor and Clara escape from the Sand planet at the beginning?