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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