Wrote this when I was 10. Dont judge :p
When Amy, Rory and the Doctor get split across the universe they are plunged into a world of peril, encountering past regenerations, Daleks and two new Alien races.
Gotta' say I'm a sucker for all things Dr. Who as I'm a massive fan of the show.. you have Matt Smith down to a tee here too!
All I would say is that you need to tidy up your writing a little... you have some really good ideas though :)