The Doctor and Romana find themselves in the Proxima System, where enigmatic Conglomerate CEO Cuthbert has been conducting his infamous 'experiment'. An experiment which might accidentally rip the universe apart. Meanwhile, living conditions on Proxima Major have become harsh and hostile. Climate change has turned the landscape into a freezing wasteland and an alien power has condemned much of the population to life inside internment camps.

The legend dates back to Roman times, at least: a great White Worm, as wide as a man, slithers out of the rocks of the Dark Peak Gap to take animals, sometimes even children, for its food. When the Doctor and Leela arrive in the wilds of Derbyshire only to get caught up in the hunt for a missing girl, they soon discover that the legend of the Worm is very much alive - even now, in 1979. Worse still, it seems that the Doctor isn't the only renegade Time Lord on the trail of this deadly and mysterious Worm....

The Tardis materialises on the USS Eldridge after the Philadelphia Experiment has gone disastrously wrong. Most of the crew are dead, the ship is disintegrating and the Doctor soon realizes that the problem comes from another dimension.... As they attempt to find a way to get the ship home, the Doctor and Peri visit the distant planet Capron and meet its tyrannical ruler, Osloo. But the search for a possible solution only creates increasingly dire problems. Osloo's horizons have been widened - and space and time are hers for the taking....

In a desolate Cornish landscape littered with relics of prehistoric man, the Doctor and Evelyn uncover a catalogue of mysteries. What is the secret of the fog? Can the moor be haunted by a demonic host of imps? And what is Brigadier Lethbridge-Stewart doing in Pengriffen? Teaming up with his old friend, the Doctor realises that an ancient conflict is nearing its conclusion - and Lanyon Moor is set to be the final battleground. Written and directed by Nicholas Pegg.

Tracking a nexus point in time, the Doctor meets Dr. Evelyn Smythe, a history lecturer whose own history seems to be rapidly vanishing. The Doctor must travel back to Tudor times to stabilise the nexus and save Evelyn's life. But there he meets the Queen of England and uses all his skills of diplomacy to avoid ending up on the headman's block.... Written by: Jacqueline Rayner. Directed by: Gary Russell.

The first time the fearsome Kraals attempted to take over the Earth, with the help of their android agents, things didn't go quite according to plan - thanks to the time-travelling alien Doctor and his allies at UNIT. This time Marshal Grinmal and his belligerent cohorts are ready for them. This time they'll make no mistakes. This time Chief Scientist Tyngworg has not just one plan but a backup plan and a backup backup plan worked out.

On their mission to explore the Mariana Trench at the very bottom of the ocean, the deepest and most inhospitable place on Earth, the crew of the deep sea vehicle Erebus make an unusual and startling discovery. A battered blue police box. As the Doctor, Romana and K9 join them on their journey, the submariners soon discover that the TARDIS is not the only unusual find lurking on the sea floor.

Many years ago, on a dark and stormy night, the disfigured and enigmatic Dr John Smith invited his closest friends, Inspector Victor Schaeffer and his wife, Jacqueline, to a dinner to celebrate his birthday. A few hours later all the occupants in that house had been changed - ­some were dead, others mentally scarred forever by the events of that night. So, what happened to the distinguished dinner guests on that evening? Perhaps we'll never know.

The universe stands on the brink of a dimensional crisis - and the Doctor and Raine are pulled into the very epicentre of it. Meanwhile, on Earth, UNIT scientific advisor Dr Elizabeth Klein and an incarnation of the Doctor she's never encountered before are tested to the limit by a series of bizarre, alien invasions. At the heart of it all is a terrible secret, almost as old as the Time Lords themselves.

To continue Leela’s education, the Doctor promises to take her to the famous Morovanian Museum. But the Tardis lands instead in a quiet English village, where they meet the enigmatic collector Harcourt and his family. When people start to die, reality doesn’t appear quite what it was. There’s something sinister going on within the walls of Harcourt’s manor, and the stakes are higher than they can imagine.

Britain. The height of the Roman occupation. The Doctor has brought Leela to ancient Norfolk to learn about her ancestors...but has no idea how much of an education she is going to get. Because this is the time of Boudica's rebellion. When the tribe of the Iceni rises up and attempts to overthrow the Roman masters. As Leela begins to be swayed by the warrior queen's words, the Doctor has to make a decision: save his friend...or save history itself?

Cuthbert's plan for the Proxima System is reaching its final phase. The Doctor and Romana have been separated. The Doctor is aiding the Proximan fight-back. Romana and K9 are prisoners of the Daleks. And as the countdown to the opening of the Quantum Gateway begins, the Daleks reveal their true intentions.

'Farewell, Great Macedon': The TARDIS materialises in the Hanging Gardens of Babylon, one of the Seven Ancient Wonders of the World, in the year 323 BC. The Doctor, Ian, Barbara and Susan meet Alexander the Great - but their excitement is tempered by the realization that these are the final days of Alexander's life. As the travellers become embroiled in the tragic events, the inevitability of history unfolds around them. But can they - and should they - change it?

They call him The Pugilist. It is the dawn of a new century and a vigilante is on the loose. The scourge of the criminal underclass. The saviour of the virtuous and the protector of the weak. The police are baffled, the public enamoured...but Professor George Litefoot and Henry Gordon Jago are on the case. Or at least they will be when they've finished their beer. What is the source of The Pugilist's spectacular supernatural powers? Is he alone in his noble quest?

An excellent jumping-on point for new listeners.... Paul McGann's Eighth Doctor starts another phase of his adventures with a brand-new companion (Lucie Miller, played by the award-winning Sheridan Smith) and an all-star supporting cast. Originally broadcast on BBC Radio 7.... 'The crashed ship. The one Tom Cardwell saw all those years ago. And you borrowed its technology, didn't you? Maybe even found a Dalek or two in the wreckage. Dead but intact. And you began to turn human beings into creatures like them.'