Broadcast: Thursday 25th December 2014
4:15pm-5:15pm EST (21:15 GMT) < > « »
CTV Sci-Fi Channel (adverts during broadcast)

Featuring: Peter Capaldi, Samuel Anderson, Jenna Coleman, Christopher Fairbank, Joivan Wade

Separated from the Doctor, Clara discovers a new menace from another dimension. But how do you hide when even the walls are no protection? With people to save and the Doctor trapped, Clara comes up against an enemy that exists beyond human perception.
Synopsis Source: SPACE episode listing