On a moon of the ruined planet Akoshemon, an age-old terror is about to be reborn. Something that remembers the spiral of war, pestilence and deprivation - and rejoices in it. The Fifth Doctor joins a team of archaeologists searching for evidence of the planet's infamous past, and uncovers more than just ancient history. Forced to confront his own worst fears, even the Doctor will be pushed to breaking point - and beyond. An adventure featuring the Fifth Doctor as played by Peter Davison and his companions Tegan and Nyssa