I was looking at the Dr Who website when I seen This news story titled Series Three!.
Now assuming they meaning of the newly stiled Dr Who, this should be talking about series 29 because we have just seen the first series of the new reimaged Dr Who which was series 27.
It goes on to say the Ciybermen Will be back (YAY) and that Billie will have a more central role in series 28, but she leaves in the next series so expect her to save the world by dieing in some last symbolic gesture of free will.
Expect series 28 in March, according to that page anyway, but the real series three was shown in 1965.