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?
Writer: Peter Harness. Director: Daniel Nettheim. Producer: Peter Bennett.
Cast: Peter Capaldi and Jenna Coleman
Guest Cast:Ingrid Oliver, Jemma Redgrave, Rebecca Front, Jaye Griffiths, Gretchen Egolf