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Watch: Doctor Who "The Zygon Invasion" Preview


Check out the preview above for the next episode of Doctor Who "The Zygon Invasion."

Doctor Who airs Saturdays at 9pm ET on BBCA.

Episode synopsis:

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’s too late?