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The Planets Series 1 Episodes

  1. Next Wednesday 21:00
    BBC Four

    A Moment in the Sun - The Terrestrial Planets

    1/5 The four inner planets were born the same, yet have lived radically different lives. Why? (R)

  2. Next Thursday 02:35
    BBC Four

    A Moment in the Sun - The Terrestrial Planets

    1/5 The four inner planets were born the same, yet have lived radically different lives. Why? (R)

  3. Wed 21 Oct 2026 21:00
    BBC Four

    The Two Sisters - Earth and Mars

    2/5 Brian Cox reveals how our solar system was once home to two blue planets. (R)

  4. Thu 22 Oct 2026 02:30
    BBC Four

    The Two Sisters - Earth and Mars

    2/5 Brian Cox reveals how our solar system was once home to two blue planets. (R)