Programme website: With UNIT neutralised, only the Doctor stands in their way. But how do you stop a war? And what can the Doctor do to .\rbr\rbrCatch the eighth episode of the new series, The Zygon Inversion from the 7th November. Subscribe here for more exclusive Doctor Who clips and content .\rbr\rbrProgramme website: Shapeshifting aliens have been living in secret among us on Earth, unknown until now!\rbr\rbrSo with The Zygons set to Return in Episodes 7 & 8 of Series 9 titled The Zygon Invasion & The Zygon Inversion I have decided to a Previously Style BBC One .