Two missions. One costumed ball. The Doctor has sent Peri and Erimem to prevent the fabulous Veiled Leopard diamond from being stolen. Which is odd, seeing as the Doctor has sent Ace and Hex to steal the diamond. How will the two teams cope with this contradictory task? Will Peri's asp slip? Why does Ace have to pretend to be a French maid? How will Erimem cope with Pharoh Rammalamadingdong? And can Hex really 'do posh'?

    She is a Tracer, sent into our Universe by her makers to locate the six segments of the Key to Time. This being without a name wants the Doctor to be her assistant, but she doesn’t tell him the whole truth. Not at first.Their first port of call is Mars, where a society that one day will become Ice Warriors lives in peace and civility. But the Doctor’s arrival will change all that. The universe is dying, a choice must be made, and the Judgement of Isskar will be declared. The price must be paid - even if it takes centuries…

    The survivors inhabit a world thrown back two hundred years, a world of crop shortages and civil unrest. A world where the brightest and best of its young people are drawn to the xenophobic Earth United group.A world sliding into a new Dark Age, believes Susan Campbell, widow of one of the heroes of the Occupation. A world in need of alien intervention. A world in need of hope.But as Susan takes drastic action to secure the planet's future, she's oblivious to the fact that her student son, Alex, ensnared by Earth United, is in need of alien intervention too. Or so Alex's great-grandfather thinks.

    Here she is discovered by the Doctor and the reasonably brutal warlord Grayvorn. Together - with a peculiar nun they pick up en route - they must travel the forests and swamps of this ghastly world in Iris's double decker bus in order to tussle - to the death - with a horde of flesh-eating zombies for a mysterious and holy relic of unfathomable value and questionable pedigree. But what is the Mother Superior's part in all this?Chronological Placement: This story takes place during the television adventure, Frontios.

    They're experts as this kind of thing. Nothing can stand in their way.'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. For those still clinging to their freedom, the struggle for survival is now beyond desperate and outsiders such as the Doctor and Romana are only seen as a threat.What is Cuthbert really up to in the Proxima System, and just how does he expect the dreaded Daleks to fit into his plan?

    When the TARDIS lands on Deimos, the Doctor discovers that the Warriors' ancient catacombs are now a popular stop for space tourists.But the Martian dynasties are more than history, and the Warriors are far from extinct. It's not for nothing that 'Deimos' is the ancient word for 'dread'...

    But then a dame walks into his office and into his life. A dame who is drop dead gorgeous and drop dead deadly, offering him a case he just can't refuse. Well, he could refuse it. If he really wanted to. But he has to pay the rent. When their paths cross, Frobisher finds himself involved in a web of mayhem and intrigue. A web of gangland killings, corrupt cops, sentient bloodstains, and very rude hotel receptionists. A web of murder and deceit, treachery and fisticuffs. That sort of web. You know. The sticky kind.

    TRAVELLER IN TIME AND SPACE seeks male or female companion with good sense of humour for adventures in the Fourth and Fifth Dimensions.No experience necessary.No time wasters, no space wasters please.

    Transported aboard the Time Lords' orbiting courtroom, the Doctor once again encounters the Valeyard, an amalgamation of the darker sides of his nature. This time, however, the Doctor isn't in the dock. This time, the Valeyard is the defendant, accused of a crime so terrible that the presiding Inquisitor is forbidden to reveal it even to the court, nor even to his counsel for the defence… the Doctor.If the Valeyard is found guilty, he'll be executed. Execute the Valeyard, and the secret of his origins dies with him. A secret that the Doctor is desperate to know… and which the Time Lords will stop at nothing to protect.

    By pure accident, they also capture the TARDIS.The Doctor and Peri must use all their wits to survive. But what is the creature running loose in the ship's bowels? And can the Doctor save Megaptera before its song is extinguished forever?

    The third Elite Sontaran Assassination Squad closes in on its target. A dozen trained killers, but even they will be unable to bring down the invincible Strang…Manipulated by the Time Lords, the TARDIS also arrives on Dowcra. And the Doctor is set to encounter the greatest Sontaran ever cloned...

    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.The Doctor is about to discover that a little knowledge can be a dangerous thing.

    Strange things have been happening at the isolated Abbey of Kells: disembodied voices, unexplained disappearances, sudden death. The monks whisper of imps and demons. Could the Lord of the Dead himself be stalking these hallowed cloisters?The Doctor and his companion find themselves in the midst of a medieval mystery. At its heart is a book: perhaps the most important book in the world. The Great Gospel of Columkille. The Liber Columbae.

    His name is Zarl, and he's a fish of utmost evil. Zarl is going to steal all the water of Earth and sell it to the highest bidder. Or blow up the San Andreas fault. Or the planet. Or something like that. He's a bit vague on that point. Fortunately, to stop him there’s help from an unexpected source: a future version of Peri. She knows Zarl's dark secret. But should the future Peri be on Earth at all? Something smells fishy – and it's not just Zarl.

    Well, apart from Romana's latest scheme, the opening up of Gallifrey's famed Academy to the students of alien races with the ability, or the potential, to harness temporal powers. Unfortunately, deep below the Capitol, Leela, confused and morose over the truth about her husband Andred, disturbs a malevolent power. Something from the Dark Days of Ancient Gallifrey. Something that wants to be reborn and will use any and every means that is at hand. Including the past of Gallifrey's incumbant President…