A drilling project penetrates the Earth's crust with adverse consequences.

Dr. Who and Sarah (Elisabeth Sladen) answer a distress call from the fringe of the universe. Braun: Terence Brook. Baldwin: Tony McEwan. Sorenson: Frederick Jaeger. Vishinsky: Ewen Solon.

The Doctor meets another Doctor with a sonic screw driver.

Rose Tyler has faced danger and seen wonders alongside the Doctor, but now their friendship is put to the test as Earth plunges into an epic war. With the human race being slaughtered, the Doctor is forced into terrible action. Will the time-travellers ever be reunited?

An unmanned spaceship carrying dinosaurs hurtles out of control, but the Doctor tries to save it and its prehistoric cargo.

The Doctor and Clara arrive at the dilapidated theme park Hedgewick's World and are confronted by the Cybermen.

Clara wants to see something awesome, so the Doctor whisks her off to the inhabited rings of the planet Akhaten, where the Festival of Offerings is in full swing. Clara meets the young Queen of Years as the pilgrims and natives ready for the ceremony. But something is stirring in the pyramid, and a sacrifice will be demanded.

The Doctor and Clara land on a damaged Russian submarine in 1983 as it spirals out of control into the ocean depths. An alien creature is loose on board, having escaped from a block of Arctic ice. With tempers flaring and a cargo of nuclear weapons on board, it's not just the crew but the whole of humanity at stake.

The Doctor meets another Doctor with a sonic screw driver.

Part 2. The Doctor forms a deadly alliance to save humanity.

Turning back the clock has consequences.

As a spaceship hurtles towards the sun, the Doctor and Martha have just 42 minutes to save the day.

Part 1. The Doctor finds an unusual hiding place.

History is out of sorts on the day the Doctor is supposed to die.

Part 2. Smith and Jones are under siege.

When people start to disappear, a young woman finds cryptic messages bleeding through from a mysterious stranger called the Doctor.

Capt. Jack storms back into the Doctor's life; the Tardis travels to the end of the universe.

Part 1. Harry Saxon becomes Prime Minister, but has dark ambitions.

Part 2. With The Doctor imprisoned by The Master, Martha endeavors to save the world.

Kylie Minogue joins Doctor Who to play Astrid, a waitress on a doomed spaceship that eerily resembles the Titanic. When a meteor hits, Astrid and The Doctor must protect the survivors from and prevent the whole ship from crashing to Earth.

The Earth is on the brink of its final war, or a new age of harmony.