Well there would be if anyone was that bothered with actually keeping track, but… well by and large, the Doctor Who approach to continuity has revolved around not really caring if things are consistent. For example, the daleks in “Genesis of the Daleks” can’t be destroyed by pushing them into a coat, whereas the original daleks in “Daleks” absolutely could be, in spite of that story being set later on. Usually if an item or person touches their future/past self, there’s a large energy discharge… except that one time when flying space monkeys showed up to eat everything instead. And except when the Doctor touches one of his other regenerations. That doesn’t count. … Because reasons. Atlantis exists, everyone agrees on that, but there’s a three way disagreement as to how it was actually destroyed, and the Doctor is half human, on his mother’s side, but only when he’s Paul McGann, and even then, only once.
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