Series: 9
Original Air date: November 7, 2015
Number Doctor: 12th
Companion(s): Clara Oswald
Writer(s): Peter Harness and Steven Moffat
Director(s): Daniel Nettheim
Guest Stars:
Ingrid Oliver as Osgood
Jemma Redgrave as Kate Stewart
Nicholas Asbury as Etoine
Synopsis: With the Zygons invading England, and UNIT neutralized, the Doctor stands alone to stop the Zygons from taking over the entire planet. But how can he stop the Zygons? And how can he save his friends?