Pax Lucis was an English village which was occupied by the Nazis during the Second World War. It was visited by the Seventh Doctor and Melanie Bush, who found that a barrier had cut the village off from the rest of the world. The Doctor discovered the Nazis had captured the Lightwanderer, a creature that fed on solar radiation. The Nazis plotted to create a barrier around the Earth, which would destroy the planet. The Doctor gained an ally in the Nazis' commander, Luther, who sacrificed himself by blowing up "the weapon", saving the planet. (PROSE: Special Weapons)

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