Broadcast: Friday 25th December 2015
3:30pm-4:30pm EST (20:30 GMT) < > « »
CTV Sci-Fi Channel (adverts during broadcast)

Featuring: Peter Capaldi, Jenna Coleman, Jenna Coleman, Ingrid Oliver, Jemma Redgrave

Shapeshifting Zygons are everywhere in the UK, and there is no way of knowing who to trust. With UNIT neutralised, only the Doctor stands in their way. But how do you stop a war? And what can the Doctor do to save his friends?
Synopsis Source: Doctor Who Guide