"Publication Order #6
The Time Lords discover that the Master has stolen secret files revealing the location of the dreaded Doomsday Weapon. They summon the Doctor out of his exile on Earth and send him five centuries into the future to the planet Uxarieus to retrieve and safeguard this vital information.
Arriving on Uxarieus, the Doctor and Jo encounter a group of Earth colonists whose very existence is under threat due to failing crops and low morale. Representatives of the ruthless Interplan"