This Doctor Who novel, written by Jim Mortimore, was published by Virgin in October 1993.
‘Not men, Ace. Silurians. The original rulers of the Earth.’
The TARDIS is attacked by an alien force; Bernice is flung into the Vortex; and the Doctor and Ace crash-land on Earth.
An attack by dinosaurs convinces the Doctor that he and Ace have arrived in the Jurrassic Era. But when they find a woman being hunted by intelligent reptiles, he begins to suspect that something is very wrong.
Then they meet the embittered Brigadier Lethbridge-Stewart, leading the remnants of UNIT in a hopeless fight against the Silurians who rule his world. And they find out that it all began when the Doctor died…