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Watch Doctor Who Season 21 Online

  • 7.9/10
  • COUNTRIES: United Kingdom
  • Subtitles: English

Earth's ocean floor, 2084. With two superpowers poised on the brink of a devastating photonic war, a missile base comes under attack from the reptilian Sea Devils and Silurians, intent on eradicating the upstart human race and reclaiming the planet…