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Scaroth intends to travel back in time to save his own people from destruction. But the Doctor can't allow him to succeed as it would mean the destruction of all life on Earth.

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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.