The Doctor and Donna visit Pompeii in AD 79, on the eve of the eruption of Mount Vesuvius.

The Doctor takes Donna to her first alien world, but the Ood-Sphere reveals some terrible truths about the human race.

Part 1. Sontaran warriors set their sights on the Earth and its inhabitants.

Part 2. As poison gas suffocates the Earth's population, the Doctor and UNIT team members work to eliminate the threat.

The Doctor takes Rose home - a year later than planned. But all attention is on another alien spaceship which crash-lands in the Thames. London is closed off and the whole world is on Red Alert. While the Doctor investigates the alien survivor, Rose discovers that her home is no longer a safe haven. Who are the Slitheen?

Rose is the ideal companion for the Doctor ? she's gutsy, brave and funny. And in turn the Doctor offers Rose more than she can get from her mundane life with his time-traveling adventures. Executive producer Russell Davies reveals why it was important to make the Rose character different from the Doctor's previous companions.

The Krynoid develops quickly on Chase's country manor. Chase: Tony Beckley. Dr. Who: Tom Baker. Sarah: Elisabeth Sladen.

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

In a house on Aickman, there is a staircase that people go up, but never down. To solve the mystery of the man upstairs, the Doctor must pass himself off as a normal human being, and share a flat with Craig Owens.

A space liner carrying Amy and Rory on their honeymoon is caught in a strange electrified cloud.

Part 1. A solar tsunami liberates doppelgangers from their human 'originals' in a futuristic factory. Can the Doctor prevent all out civil war?

Part 2. The Doctor must convince terrified factory-workers to work with their doppelgangers to overcome a monster of their own making.

The Doctor assembles an army to face the Battle of Demons Run - and River Song has something to tell him.

The TARDIS crash lands in 1930's Berlin, bringing the Doctor face to face with the greatest war criminal in the Universe. And Hitler.

Every child is scared of monsters, but George's terrified pleas for help reach the Doctor. Because George's monsters are real.

Amy is trapped in a quarantine facility for victims of an alien plague. Can Rory save her before she is killed by kindness?

The TARDIS lands in a hotel where every visitor's room contains their deepest, darkest fears. What lies in wait in the Doctor's room?

The Doctor's final days are upon him - but when he drops in on an old friend, the Cybermen are waiting.

By the shores of Lake Silencio, in Utah, all of time and space hang in the balance - because this is the day the Doctor dies.

Evacuated to a house in Dorset from war-torn London, Madge Arwell and her two children, Lily and Cyril, are greeted by a madcap caretaker whose mysterious Christmas gift leads them into a magical wintry world.

The Doctor meets the most important woman of his life.

Agatha Christie's 10-day disappearance in 1926 may have been the result of amnesia, a nervous breakdown, or a giant alien wasp.

Part 1. The Doctor and Donna must uncover the truth behind the Nodes and the Data Ghost to uncover the library's secret.

Part 2 . As the shadows rise, the Doctor forges an alliance with the mysterious River Song.

Amy and Rory are trapped on a crashing space liner, and the only way The Doctor can rescue them is to save the soul of a lonely old miser. But is Kazran Sardick, the richest man in Sardicktown, beyond redemption? And what is lurking in the fogs?

Following the adventures of a time-traveling alien called "The Doctor" and his human companions as they deal with crises set on Earth and other worlds.