Shapeshifting Zygons are everywhere in the UK, and there is no way of knowing who to trust. With UNIT neutralised, only the Doctor stands in their way. But how do you stop a war? And what can the Doctor do to save his friends?The Zygon Inversion premieres Saturday November 7th, BBC One at 8pm.
Doctor Who: THE ZYGON INVERSION Gallery
How do you invert an invasion?