When the planet Archetryx is threatened by a Dalek assault squad, the Doctor and Evelyn become embroiled in an ever-deepening mystery. What has become of President Romana, missing for twenty years? What lurks in the vast gravity wells of Archetryx? What is the secret of the ancient element the Daleks are synthesising - and how does Gallifrey feature in the plans? The Doctor finds that if his oldest enemies cannot conquer the universe they will watch it go up in flames...

Two thousand years ago, a volcanic eruption wiped the Roman city of Pompeii from the face of the Earth. It also buried the Doctor's TARDIS... Arriving in Pompeii one day before the disaster, the Doctor and Mel find themselves separated from their ship and entangled in local politics. As time runs out, they fight to escape from the shadow of Mount Vesuvius. But how can they succeed when history itself is working against them?

The Pinehill Crest Hotel in Kent is host to three very different events: a cross-stitch convention, an experiment in time travel and... the summoning of the scourge. The Doctor, Bernice and Ace find themselves dealing with a dead body that's come back to life, a mystical symbol that possesses its host, and a threat from another universe that's ready for every trick the Doctor's got up his sleeve. This time, has the Doctor gone too far?

The TARDIS lands in a forbidding castle in a time of religious upheaval. The old god has been overthrown, and all heretics are to be slaughtered. Obviously it isn't the sort of thing which would happen there every day - just every few years or so. And when the Doctor and Frobisher are hailed as messengers from heaven, they quickly become vital to opposing factions in their struggle for power. But will they be merely the acolytes of the new order - or will they be made gods themselves? An evil destructive force is growing deep within the crypt. And the pair soon find out that they will be lucky to escape their new immortality with their lives.

In the 22nd century, the Daleks have occupied planet Earth. By the 43rd century, only a handful of humans survive. Still further into the distant future, a Thal scientist must choose whether to betray his heritage, or see the universe destroyed. When the Doctor and Nyssa find themselves trapped in this deadly chain of events, they must decide who their real enemies are. What is certain is that no matter where the Doctor turns, the Daleks, will be waiting for him. What could possibly be worse than that? The Mutant Phase...