We go behind the scenes at the creation of something special for Doctor Who herself. See how state of the art technology brings Danger Mouse's Penfold to life and head deep beneath the waves to find out how fish create light to survive in the dark. Also, we announce the winner of our latest competition.

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  • Episode Number 48
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  • Originally Aired Thursday, November 22, 2018
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  • Last Updated By botchla
  • Last Updated 11/22/2018 2:15pm