Nyssa will die at dawn, and the Doctor doesn't even know why. To save her life, he must make a desperate journey to the only place in the universe where a cure might exist. When even that fails, the Doctor has a choice - let Nyssa die, or make a deal with the devil. After all, the road to hell is paved with good intentions.... Written by Lance Parkin. 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.

Landing in Alaska, the Doctor and Nyssa encounter a group of people in a most unusual house, cut off not only by the harsh climate but by their individual secrets and obsessions. Millionaire Shaun Brett is utilising chunks of the local area to construct a shrine to his dead father. But when deadly creatures start roaming outside and a terrifying discovery is made inside the house, the Doctor realises that Brett has unleashed an unimaginably ancient force. Written by Stephen Cole. Directed by Gary Russell.

On New Year's Eve, 1930, the Doctor lets Charley keep her appointment at the Raffles Hotel in Singapore. But his unease at what he's done to time by saving her life soon turns into fear. Sebastian Grayle: immortal, obsessed, ruthless, has come to the city to meet the Time Lord. To the Doctor, he's a complete stranger, but to Grayle, the Doctor is an old enemy. An enemy that, many years ago, he finally succeeded in killing. And this is his only chance to gloat.

Fourteen-hundred BC. Egypt is in mourning. Pharaoh, the great God-King, is dead. The future of the Two Kingdoms of Egypt is shrouded in uncertainty as the Council of Priests debates the claim to the throne of Pharaoh's only heir. Out in the deserts around Thebes, Egypt's capital, a warlord chief is assembling an army of mercenaries, waiting for just the right moment to strike at Egypt's heart. But not all of Egypt's enemies are outside the city.

On a dark, frozen planet where no planet should be, in a doomed city with a sky of stone, the last denizens of Earth's long-lost twin will pay any price to survive, even if the laser scalpels cost them their love and hate and humanity. And in the mat-infested streets, around teatime, the Doctor and Nyssa unearth a black market in secondhand body parts and run the gauntlet of augmented police and their augmented horses.

A strange telepathic message prompts the Doctor to travel to the Sector of Forgotten Souls, a place where, thousands of years ago, Omega's ship vanished whilst detonating a star. He's not the only one journeying towards it. Jolly Chronolidays prides itself on giving its tourists an experience of galactic history that is far better than mere time travel. Its motto is, 'We don't go into history, we prefer to bring history to you.'

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?

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....

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.

Zagreus sits inside your head. Zagreus lives among the dead. Zagreus sees you in your bed and eats you when you're sleeping....

Sheridan Moorkurk has just been elected president of Earth...And what's more, she's starting to hear voices. Meanwhile, the Doctor and Romana encounter a mass of aliens heading to Earth - aliens who have already made the mistake of upsetting the infamous Cuthbert, all-powerful CEO of The Conglomerate, by destroying one of his space platforms. Will the Doctor and Romana be able to avert interspecies war that will destroy all life on Earth?

The Doctor and Leela find themselves in the middle of London at the time of a new energy crisis. The GlobeSphere Corporation seems to have all the answers - but several thousand protestors beg to differ. What is the connection between the National Gallery and a base on the moon? Has radical thinker Damien Stephens simply sold out, or does he have a more sinister agenda?

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.