Doctor Who: Doom's Day — Jody Houser

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...