Percy Jackson world changed when his mother died when he was young. On the day of the ceremony he was about to go home with Smelly Gabe, when a man came calming to be with Social Services. The man got custody of young Percy. Percy Jackson half time lord half god is a powerful being. Now he adventures with the doctor as he meets companions and other people.
Before Rose Tyler
Percy is 7 years old
Mentions of abuse from Smelly Gabe
At some point learns he's a demigod
Meets Rose, Donna, Martha, and Amy/Rory
Sally was daughter of Poseidon but gave her powers to Percy.
Sally told Percy that his real father was traveling
Hope you enjoy...