A heatwave in July and a tube train is discovered buried in 20 inches of snow. A Saturday afternoon in Hyde Park and scores of people are instantly frozen to death where they stand while the sun beats down from the sky. Freak weather conditions in London, and the Doctor and UNIT are called in to find the cause. Meanwhile, a street magician who was witnessed at the scene of the tragedy entertains crowds in Covent Garden. As Jo Grant and Mike Yates disobey orders and investigate alone, they discover an enemy ....

A new adventure with the Fourth Doctor as told by his companion, Romana. It's 1929, and the TARDIS crew is holidaying in Antibes. While the Doctor practises his painting, Romana attempts to fend off the playful advances of young Tommy Creighton. All is peaceful and idyllic except for the portentous warning of astrologer Madame Arcana, and the fact that personal items are being stolen from the hotel's guests.

The Great Space Elevator is a marvel of human engineering, a transit tube stretching from the equator up to a space station held in geosynchronous orbit. When the TARDIS lands in Sumatra in the future, the Second Doctor, Jamie and Victoria are captured by guards just as the station loses power. Together with Security Officer Tara Kerley, the three travellers take a one-way trip on the elevator to fix the problem and find themselves confronted by a powerful alien force that threatens to wreak chaos on Earth.

Roanoke Island, 1590. The TARDIS materializes in the past, and the Doctor's companions, Professor Litefoot and Henry Gordon Jago, find themselves prisoners of the natives in the New World. But there's something strange here - stranger than even the colonists, led by Englishman John White. What are the ghostly children? And who is the Old Man of Croaton? The travellers are about to discover the secret of the lost colony...and it may cost Jago's life.

While investigating a temporal anomaly in Central London, the Doctor and Jo Grant meet Professor Harold Saunders, a man who possesses an unstable alien artefact and who is seemingly haunted by the ghosts of dolls. Who is the mysterious Mrs Killebrew? Why is a pack of hounds hunting them in reverse? And can Jo pick up any bargains while backwards shopping on Oxford Street?