Theory:Doctor Who television discontinuity and plot holes/The Greatest Show in the Galaxy


 * When The Doctor and Mags escape from the cage, why does a simple pat on the abdomen and on the back of the head disable the robots? That wouldn't even knock out a human.
 * Perhaps The Doctor recognized this model of robot and knew that a tap on the abdomen and on the back of the head will reset them, a sort of "ctrl-alt-del".