Doctor Who: The Zygon Invasion

SYNOPSIS

The Zygons have been living in secret on Earth, unknown and unseen - until now. When Osgood is kidnapped by a rogue gang of the shapeshifting aliens, 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's too late? Guest starring Rebecca Front.