The Doctor is kidnapped and forced to enter the legendary Asylum of the Daleks, along with his former companions Amy and Rory -- whose marriage is in meltdown. To destroy the enemy prison and escape alive, they must rely on help from a young girl stranded on the planet and eager for rescue.
After gathering a crew of friends the Doctor attempts to save an unmanned ship full of dinosaurs hurtling toward Earth, and finds a man on board who will stop at nothing to keep his valuable cargo.
The Doctor, Amy, and Rory try to defend an Old West town and an alien doctor from a merciless cyborg killer, only to discover that the man the "Gunslinger" is hunting hides a dark secret.
The Doctor is left with no explanation for a "slow invasion" of seemingly harmless black cubes, which become so prolific around the Earth that they become a commonplace part of daily life.
After Rory goes missing, Amy and the Doctor find an invasion of the Weeping Angels taking place in New York City -- where the Doctor must try to rewrite the future in order to save his friends.
When Victorian London is beset by an army of intelligent snow a children's governess pleads with the Doctor for help, drawing him out of his isolation to save the planet once again.
The Doctor finds Clara in modern-day London, where he learns that the whole world is under threat by a clandestine group who are using wi-fi signals to download and imprison people's souls.
The Doctor takes Clara to the inhabited rings of Akhaten, where the young Queen of Years faces a ritual that may require she sacrifice her soul to a slumbering god.
The Doctor and Clara arrive on a damaged Russian submarine and find a Martian Ice Warrior, who has just been thawed out and is threatening to seize control of the ship's nuclear arsenal.
Clara and the Doctor visit the haunted Caliburn House, where a Professor and a psychic are searching for a legendary ghost whose apparition has appeared in the mansion throughout its history -- and who herself appears to be pursued by something.
When the TARDIS is compromised the Doctor calls upon a salvage team to help rescue Clara, who is lost inside the infinite rooms and corridors of the ship -- along with a pack of aggressive creatures.
In the small, Victorian town of Sweetville, Madame Vastra and Jenny find the Doctor held captive by a woman who is leaving her victims behind as corpses with bright red skin.
The Doctor and Clara take her young friends to a legendary intergalactic amusement park, only to find a platoon of soldiers and the last survivors of the war against the Cybermen -- freshly upgraded and with their eye set on the Doctor's mind.
An old enemy manipulates the Doctor by abducting his friends, luring him to the one place he must never go -- and drawing Clara into the Doctor's own past.
