About this showing of NASA's Unexplained Files
Experts investigate if a nearby exoplanet could be the home to an alien civilization after a new discovery confirms that life can thrive on such a world.
Previously on TV
NASA's Unexplained Files
Planet Of The Metal Aliens
Previously shown on High Street TV 4 on Sun 4 Oct 2026 at 03:00.
This showing has ended
This showing was on High Street TV 4 at 03:00 on Sun 4 Oct 2026. See future airings below or open the main programme page for the latest TV times.
Airing details
ChannelHigh Street TV 4
StartsSun 4 Oct 2026, 03:00
EndsSun 4 Oct 2026, 04:00
Episode / edition: Planet Of The Metal Aliens
Next showing of NASA's Unexplained Files
The next currently listed showing is Mon 5 Oct 2026, 23:00 on Discovery .Science.
See all current showings