A mystery virus is wreaking havoc among the crew of the Earth's weather control station on the Moon. While investigations into the strange disease are in progress International Space Headquarters Earth puts the entire Moon base into strict quarantine - the Doctor and his companions included! To make matters worse, Moon base personnel inexplicably vanish and vital weather control equipment is sabotaged. Who is responsible? The Director of the base suspects the time-travellers.

Jo peered through the panel and saw - nothing. Yet someone had entered the cabin. She could hear hoarse breathing and stealthy padding footsteps. A beaker rose in the air of its own accord, then dropped to the floor... After pursuing the Daleks through space, Doctor Who lands on the planet of Spiridon, in the midst of a tropical jungle... and finds more than Daleks. Vicious plants spitting deadly poison, invisible Spiridons attacking from all sides and, in hiding, a vast army waits... for the moment to mobilise and conquer.

Whilst visiting the Master, who has been exiled to a luxurious castle prison on a small island, Doctor Who and Jo Grant learn that a number of ships have vanished in the area. Whilst investigating these mysterious disappearances, Jo and the Doctor are attacked by a Sea-Devil, one of a submarine colony distantly related to the Silurians. Soon they discover that the Sea-Devils plan to conquer the Earth and enslave humanity, aided and abetted by the Master. What can Doctor Who do to stop them?

The Doctor and Sarah arrive back in the TARDIS to find London completely deserted: except for the dinosaurs. Has the return of these prehistoric creatures been deliberately planned and, if so, who can be behind it all?

The evil Master leered at the Doctor, and triumphantly pointed out of the cabin window. The many-tentacled Nestene monster - spearhead of the second Auton invasion of Earth - crouched beside the radio tower! Part crab, part spider, part octopus, its single huge eye blazed with alien intelligence and deadly hatred... Can the Doctor outwit his rival Time Lord, the Master, and save the Earth from the Nestene horror?

An unabridged reading of this classic novelisation, based on a BBC TV adventure featuring the Third Doctor. A mysterious power loss strands the TARDIS on Exxilon, a sinister fog-shrouded alien planet. The Doctor meets the survivors of a beleaguered expedition from Earth, while Sarah finds a mysterious super-city and becomes a captive of the savage Exxilons. Worst of all, the Doctor's greatest enemies, the Daleks, arrive on a secret mission of their own.

For many thousands of years, the Suthekh had waited... trapped in the heart of an Egyptian pyramid. Now at last the time had come - the moment of release, when all the force of his pent-up evil and malice would be unleashed upon the world. The TARDIS lands in the year 1911, and the Doctor and Sarah emerge to fight a terrifying and deadly battle...against Egyptian mummies, half possessed humans - and the overwhelming evil power of Sutekh!

Outside the bounds of this world lives Kronos, the Chronivore - a mysterious creatures that feeds on time itself. Posing as a Cambridge professor, the Master intends to use Kronos in his evil quest for power. To stop him, the Doctor and Jo must journey back in time to Ancient Atlantis and to a terrifying confrontation within the Time Vortex itself. But can even the Doctor save himself from the awesome might of the Time Monster?

The TARDIS materialises on a remote island, set in a sea of acid, on the planet Marinus. The Doctor, Susan, Ian and Barbara meet Arbitan, keeper of a vast computer which rules and balances the gentle life of Marinus. Yet peace on the planet is threatened by the sub-human Voord, who wish to take control of the Conscience. Arbitan enlists the travellers to find the five crucial Keys of Marinus in various locations across the planet. Thus begins a series of terrifying adventures for the Doctor and his friends, who must find the Keys if they wish to ever to see the TARDIS again.

Again, the terrifying cry rang out. The Doctor quickened his pace along the gloomy tunnels of the castle. Suddenly, from the darkness lumbered the mighty Aggedor, Royal Beast and Protector of the Kingdom of Peladon! The Doctor fumbled in his pocket. Would the device work? As he trained the spinning mirror on the eyes of Aggedor, the terrible claws came closer and closer... What is the secret behind the killings on the Planet of Peladon?