The Doctor and Bill visit London during the last of the River Thames frost fairs in February 1814. They soon discover that there is something under the ice which is causing people to disappear.
In the far future, at the edge of the galaxy, there is a gleaming, perfect city. This brand new human settlement is said to hold the secret of human happiness - but the only smiles the Doctor and Bill can find are on a pile of grinning skulls. Something is alive in the walls, and the emojibots are watching from the shadows, as the Doctor and Bill trying to unravel a terrifying mystery... MORE -LESS
A chance encounter with a girl with a star in her eye leads to a terrifying chase across time and space. Bill’s mind is opened to a Universe that is bigger and more exciting than she could possibly have imagined - but who is the Doctor, and what is his secret mission with Nardole on Earth?