Search Worlds Without End

When the TARDIS makes a disastrous landing in the swamps of the planet Sunday, the Doctor has no choice but to abandon Martha and try to find help. But the tranquillity of Sunday's swamps is deceptive, and even the TARDIS can't protect Martha forever.

The human pioneers of Sunday have their own dangers to face: homeless and alone, they're only just starting to realise that Sunday's wildlife isn't as harmless as it first seems. Why are the native otters behaving so strangely, and what is the creature in the swamps that is so interested in the humans, and the new arrivals?

The Doctor and Martha must fight to ensure that human intelligence doesn't become the greatest danger of all.

For Donna Noble, the Andromeda galaxy is a long, long way from home. But even two and a half million light years from Earth, danger lurks around every corner...

A visit to an art gallery turns into a race across space to uncover the secret behind a shadowy organisation.

From the desert world of Karris to the interplanetary scrapyard of Junk, the Doctor and Donna discover that appearances can be deceptive, that enemies are lurking around every corner - and that the centuries-long peace between humans and machines may be about to come to an end.

Because waiting in the wings to bring chaos to the galaxy is The Cult of Shining Darkness.

To lose your memory once may be regarded as a misfortune; to lose it twice looks like carelessness. The Doctor's not himself. He's not quite sure who he is, but he's definitely not himself. It doesn't help that he's forgotten quite why he came to the colony world of Espero in the first place, but he's sure it was something important. Whatever the reason, he's not the planet's only visitor. Before long, he's engaged in the search for a time-bomb - a time-bomb that could have consequences not only for Espero, but for the Doctor himself - and his missing past.

After the end of the interstellar Tulkan wars, the militaristic Tulkan War council was sentenced to memory-wiping and incarceration in a penal colony. Their weapons, advanced slavery devices and planet destroying armaments in development, hidden in a secret cache before the end of the war, are bound to remain secret forever, the access codes to their stasis chamber wiped with the Tulk's memories. But in an old people's home in Scotland, Dr Elizabeth Brunner, Unit scientist and daughter of one of the Alzheimers patients, has noticed disturbing happenings, and calls on her old friend, the Seventh Doctor, to investigate.

What he and Ace find goes beyond disturbing, with campers murdered, the denizens of the home wired up to some sort of enormous calculating machine, and Ace being followed around by a mysterious figure, always remaining just beyond the edges of vision. They receive help from Annarenes, members of a race devoted to keeping the Tulkan menace down, but help from any quarter has to be regarded with utmost suspicion. Nothing, here, is sure to be what it seems...