Oh dear, oh dear. It's been three weeks and I haven't posted. Sorry guys! I feel guilty...Annnyways: EXCUSE TIME!!! I've just been to wrapped up with Doctor Who and the awesomeness that is season 6. Oh, the theories that are buzzing around! WHO ON GALLIFREY IS THAT LITTLE TIME LORD GIRL?!?!?!?! Or...Time Lady? That's what female Time Lords are called, right? Okay, so that little Time Lady...who is she? She regenerated, so who did she regenerate into??? Why was she in the space suit? Why did the Silence need her? WHY WOULD SHE KILL THE DOCTOR??? So many questions...
the most popular theory, I believe, is that the little girl is River from the past...well, the future...well, her past, our future.
I believe that she's the daughter of the Doctor and River. Abandoned on Earth for reasons that will be explained later, she hates her father. Finding River, she steals River's diary, finds out where the Doctor is, (the lake) and kills him. He doesn't stop her because she is his daughter, of course. River, feeling responsible that her actions lead to his death, and also wanting to protect her daughter, takes the blame and goes to prison instead of the little girl. THE END!!! :D