Doctor Who: Doom's Day. A Doctor In The House?

24 HOURS TO FIND THE DOCTOR! DOOM!

This lonely assassin from the 51st Century is hunting for her survival, and there's only one person who can save her: the Doctor.

Using her vortex manipulator, she'll do anything to find the tempestuous time traveler, including cavorting with the maleficent Missy.

Every hour a new adventure, every hour closer to death...