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As Tegan and Lon combine to give the Mara access back to reality, the Doctor locates the Great Mind's Eye crystal but realises it is instrumental in the Mara's plan...

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25 minutes

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Enter The Whoniverse

Enter The Whoniverse

Every Doctor, every companion, every enemy. Discover the Whoniverse. Only on Â鶹¹ÙÍøÊ×Ò³Èë¿Ú iPlayer.