The Time Lord's Ward

Escaping from Dudley's bullying and her relative's cruelty, Harriett 'Harry' Potter is found by her parents' old friend, The Doctor, while in his 8th Incarnation before he has to leave her with Sarah Jane Smith while he fights in the Time War. When he returns in his next incarnation, he's more than ready to look after her and show her the universe while she's off school...