"Publication Order #46
Eldrad was once hailed as the saviour of the world of Kastria. He erected force-barriers around the planet, preventing its imminent destruction. However, when the Kastrians refused to submit to his dictatorship, he removed his force-fields, condemning an entire civilisation to a slow and agonising death. For this, the mightiest of crimes, the people of Kastria sentenced Eldrad to obliteration.
Millions of years later, the Doctor's TARDIS materialises in an English quarry."