Blu was not a happy TaRDiS. At all. She and Poet were stuck on Earth, and Blu couldn't do a thing until she found fuel. How boring. However, she was stuck on the Earth. In London. And if anyone had been in London enough, they would know it got invaded by aliens regularly. Cybermen, Daleks, Sycorax, Zygons, you could find yourself facing them any minute. Blu had changed when the metacrisis happened. She was like a TaRDiS, but she wasn't. It was strange. Anyway, while she couldn't travel through time and space, she could walk and run. And now she was running.