Quote Originally Posted by Captain Happy View Post
Exploding TARDIS from season five.

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So they are responsible for blowing up the Tardis. Why? How?
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So that the necron TARDIS and little girl can take the place of the current TARDIS and the Doctor. Hence the killing of the Doctor at the beginning of E01. If it's indeed the little girl inside the suit, and she kills him, then it's entirely possible that the Silents have manipulated her into doing that, too.

To achieve what, though...