Malcolm Hulke was a British science fiction writer celebrated for his contributions to the beloved Doctor Who series. His stories were distinguished by their exploration of complex moral ambiguities, eschewing simple good versus evil narratives and often imbued with a left-wing political perspective. Hulke is credited with crafting numerous episodes, including the creation of the enduring Silurian race. Beyond his television work, he also penned novelizations of his screenplays.
Unknown to the Doctor and his colleagues, the work at the centre has woken a group of Silurians - intelligent reptiles that used to be the dominant life form on Earth in prehistoric times. As UNIT soldiers enter the cave systems, and the Silurians unleash a deadly plague that could wipe out the human race, the battle for planet Earth begins.
The Doctor and Sarah arrive in London to find it deserted. While the Doctor works to discover who or what is bringing the dinosaurs to London, Sarah finds herself trapped on a spaceship that left Earth months ago travelling to a new world... Against the odds, the Doctor manages to trace the source of the dinosaurs.