The Doctor From Gallifrey 

WARNING: Do not read if you do not want to find out what happens at the end of Day of the Moon

As promised here is a list of wild possible theories about who the girl at the end of Day of the Moon is:

• Amy and the Doctor's daughter
• River and the Doctor's daughter
• River Song
• Jenny, the Doctor's Daughter
• A different daughter from the Doctor
• A time lady we have met before e.g. Romana, the Rani
• A former companion or something to do with them e.g. Rose or Donna
• The Master's Daughter
• Some descendant of the Susan, the Doctor's grandchild in First Doctor era.
• A survivor of the Time War (random Time Lady).
• Somone else..comment with anything else you can think of!