Sir Thursday;299898 said:
I haven't been keeping track of where the hand has been at all times...I know Jack had it in Season 1 of Torchwood...did he have it when he showed up at the end of Season 3? Can't remember. From memory though, it was definitely on earth until that point. So how has it managed to go gallivanting off round the galaxy?
I've been thinking about this, and come up with a rather neat idea... well, I hope so anyway.
After his hand was cut off in the Christmas Invasion, it was presumably just lying around in a back-yard somewhere until Captain Jack found it. But, after that, what else happened to the hand in between Jack having it to find the Doctor, and the Doctor having it in the Tardis... that's right, it was in the possession of the Master. Now, it's plausible, and even probable, that the Master did more with that hand than simply calibrate his sonic Lazarus widget to the Doctor... thus, the Doctor's daughter is not friendly to him, as was sort of portrayed in the trailer, and could, in fact, be the woman with the red fingernails we saw picking up the Master's signet ring at the very end of series 3. This last bit does assume she has some sort of time-travelling ability herself, and where she might find a device to allow her to do that, I don't know, but I could see it happening.