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.
On the most beautiful train in history, speeding amongst the stars of the future, a deadly and immortal creature is stalking the passengers.
In the near future, the Doctor and Clara find themselves on a space shuttle making a suicide mission to the moon. Crash-landing on the lunar surface, they find a mining base full of corpses, vicious spider-like creatures poised to attack, and a terrible dilemma. When Clara turns to the Doctor for help, she gets the shock of her life.
When terrifying events threaten Coal Hill school the Doctor decides to go undercover. The Skovox Blitzer is ready to destroy all humanity – and worse, any second now, Danny Pink and the Doctor are going to meet.