The Zygon Invasion

S9, E7: The Zygon Invasion

Available on iTunes, HBO Max
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, the Doctor, Clara and UNIT must scatter across the world in a bid to set her free.
Starring Ingrid Oliver, Jemma Redgrave, Jaye Griffiths