Note: Had previously been released on the Monsters on Earth box set. Subsequently re-released as part of the Classic TV Adventures: Collection One box set.
Jon Pertwee stars as the Doctor in the original soundtrack of this classic 1970 TV adventure, with linking narration by Caroline John
On Wenley Moor in Derbyshire, a nuclear energy research centre is suffering mysterious power losses and a series of staff breakdowns. Investigating on behalf of UNIT, Brigadier Lethbridge-Stewart calls the Doctor in to help, assisted by the scientist Liz Shaw.
What the Doctor discovers is quite unexpected: the power losses are being caused by a group of intelligent, indigenous reptiles living in caves deep beneath the moor. These are creatures who ruled Earth before Man, and they have lain dormant for centuries. Now awoken, they still believe Earth to be their planet.
A power struggle amongst the Silurians threatens to overwhelm the Doctor's attempts to acheive peace between the reptiles and the humans. And when a deadly virus is released and spreads throughout the country, the Doctor and Liz must work against the clock to save humanity...
In an additional bonus interview, Caroline John who also provides linking narration for the story, recalls making Doctor Who and the Silurians for television.