Doctor Who, Season 12 Episode guide
The time ring returns the Doctor, Sarah and Harry to space station Nerva.
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The Time Lords foresee Daleks conquering the Universe. Can their genesis be averted?
The Doctor, Sarah and Harry arrive on Earth which is now a desolate wilderness.
The TARDIS materialises aboard the Ark, a space station in orbit around Earth.
Recovering from his regeneration, the Doctor investigates the robbery of top secret plans.
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