From a ruined world at the end of time, the vicious Sild make preparations to conquer the past and rewrite history. They've hardly begun, though, when something even stranger takes hold: The Brigadier and others are starting to forget about UNIT's highest-profile prisoner. To save the universe, he m...

From a ruined world at the end of time, the vicious Sild make preparations to conquer the past and rewrite history. They've hardly begun, though, when something even stranger takes hold: The Brigadier and others are starting to forget about UNIT's highest-profile prisoner. To save the universe, he must save his arch-nemesis...