This AU it's from one of my headcanons. After leaving Earth with Ashildr in their TARDIS, Clara begins to see a strange number everywhere she goes, 13. She immediately understands what that number means and explores the Earth searching for the Doctor. When she finds him, he's not like he used to be, he's already regenerated. But Clara can always recognize him. Her Doctor. Thanks to the regeneration the Doctor now remembers Clara. They leave together in their own TARDIS.
Music: Clara's Theme - Murray Gold
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