Bøker i Doctor Who: The Lost Stories-serien i rekkefølge

This story sees the role of popular companion, Sarah Jane Smith, originally played on TV by Elisabeth Sladen, taken up for the first time one audio by her daughter, Sadie Miller.

The Doctor, Romana and K9 find themselves at the centre of a most unusual trial when an intergalactic corporation wants to bulldoze planet Earth for a development project. If The Doctor can Earth contains intelligent life, the whole world will be saved. But with a fortune at stake, it was never going to be that simple.

During one of Nyssa's experiments, the TARDIS's temporal scanner picks up a message: 'Idra'. Just one word, but enough to draw the Doctor to the Archipelago of Sirius. There, the Autarch is about to announce a new crusade. A mighty war against Seth, Prince of the Dark...

The year is 1989. In London, safecracker Raine Creevy breaks into a house - and finds more than the family jewels. In the Middle East, the kingdom of Sayf Udeen is being terrorised by Soviet invaders and alien monsters. And on the Scottish border, a highly guarded facility contains an advanced alien weapon. All are part of the Doctor's masterplan.

When a newspaper reporter goes missing, the Doctor, Tegan and Nyssa uncover a case of alien abduction. The trail leads them to the planet Luparis, and a city that appears to be a replica of Tudor London. What are the monsters that lurk in the shadows? And what is the terrible secret at the heart of Luparis?

With the TARDIS working perfectly, the Doctor and Peri decide to take a holiday. But where? A long-forgotten piece of equipment in the TARDIS storage locker sends them to the peaceful and idyllic continent of Tranquela - home of the Doctor's old friend Ravlos.