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HorizonEpisodes

  1. Monday22:30
    BBC Four

    Pluto: Back from the Dead2020

    How Pluto has gone from an unremarkable ball of ice to a world of unimaginable complexity.(R)

  2. Wed 22 Apr 202600:30
    BBC Four

    Volcanoes of the Solar System2017

    Discover the parallels between Earth's volcanoes and those elsewhere in the solar system.(R)

  3. Thu 23 Apr 202600:40
    BBC Four

    Volcanoes of the Solar System2017

    Discover the parallels between Earth's volcanoes and those elsewhere in the solar system.(R)