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Narrated by: Caroline John, Full Cast, Jon Pertwee

Unabridged — 3 hours, 11 minutes

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Overview

'The planet is ours. It always has been!' 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 the creatures ...