225b. Cortex Fire

The Doctor brings Flip to the futuristic city of Festin, the best vantage point to witness a unique astronomical light show. In a city governed by the all-powerful network known as the Cortex, they're soon identified as outsiders - nihilists, perhaps, responsible for a wave of terror that’s been sweeping the city... But the truth is different. The people of Festin are burning up. Spontaneously combusting. And no-one knows why.

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