9.7 - The Zygon Invasion

The Zygons, a race of shapeshifting aliens, have been living in secret amongst us on Earth, unknown and unseen - until now! When Osgood is kidnapped by a rogue gang of Zygons, the Doctor, Clara and Unit must scatter across the world in a bid to set her free. But will they reach her in time, and can they stop an uprising before it is too late?

79 out of 119 (66.4%) raters say this story requires a previous story.