The Doctor and Sarah transport to Exxilon outside a city that seems to live like an organism. Soon after, the Doctor realizes he must find an elusive antidote to defeat a galactic plague spread by the Daleks.

Since the planet Exxilon is futile because of an energy drain leaving TARDIS without power, the Doctor is forced to look for the antidote to a galactic plague. To make matters worse, the Daleks--the creators of the plague--have arrived.

On Exxilon, a war rages between two factions caging the Doctor and Sarah in the middle. Aided by rebel leader Bellal, the Doctor and Sarah continue their perilous search for the cure to neutralize an imminent plague.

An unstable alliance between the humans and Daleks results from their common goal of destroying the 'living city.' Despite their intentions the Doctor has a much safer solution, spoiling the Daleks plan to unleash an apocalyptic plague.

The Doctor arrives on a hallowed out "pirate" planet that has been fitted with hyperspace engines, allowing its insane half-robot Captain to materialize it around smaller planets and plunder their resources.

The TARDIS is infiltrated by the Swarm - a space-borne intelligence that wishes to spread itself across the universe - and the Doctor is infected by its nucleus. The ship then materialises on Titan, one of the moons of Saturn, where the human occupants of a refuelling station have also been taken over.

Rezzies hold Mel prisoner.

Cleaning robots menace the Doctor.

As the New Year begins, a terrifying evil is stirring, from across the centuries of Earth's history; as the Doctor, Ryan, Graham and Yaz return home, they must try to overcome the threat to the planet.

The Doctor and her companions discover the luxury resort where they are staying is hiding a number of deadly secrets; they must discover why there are ferocious monsters attacking Tranquillity Spa.

The Doctor makes a final stand against an army of Cybermen in order to protect humans from destruction.

The villainous slave ship commander Rorvik has deadly plan for Romana.

The villainous slave ship commander Rorvik has deadly plan for Romana.