Time Lord

"Time Lord", not be confused with the race of people, is the thirteenth episode in the ninth season of Doctor Who and is the first part of the three part season final, seeing the Doctor face off against the Talons of Faran, while Billy is stranded on Earth.

Synopsis
"We are the Talons of Faran, and you are our final feast" - The Talons, to the Doctor

As the Talons of Faran close in on the Doctor, Billy is stranded on Earth. Is this the Doctor's final battle, or will he survive another day.