The episode will last for a slightly extended 50 minutes, and finishes at 9.05pm. The Zygon Invasion, penned by Peter Harness, will air on the same day on BBC America at 9/8C.
The Zygons, a race of shapeshifting aliens, have been living in secret among 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’s too late?[Source: BBC]