Doctor Who: Jaunts through space & time

Here's the official BBC blurb for Doomsday:
"It's the end of an epic journey as two mighty armies wage war across the Earth, with the human race caught in the middle. But as an unstoppable terror emerges from beneath Torchwood, the Doctor faces an even greater dilemma – does saving the world mean the death of Rose Tyler?

David Tennant plays the Doctor and Billie Piper plays Rose.
Read the BBC site here