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.
Coming up on TV
NASA's Unexplained Files
Planet Of The Metal Aliens
On Discovery .History on Fri 4 Sep 2026 at 14:00, ending at 15:00.
When is it on?
NASA's Unexplained Files starts at 14:00 on Discovery .History on Fri 4 Sep 2026.
Airing details
ChannelDiscovery .History
StartsFri 4 Sep 2026, 14:00
EndsFri 4 Sep 2026, 15:00
Episode / edition: Planet Of The Metal Aliens
Next showing of NASA's Unexplained Files
The next currently listed showing is Thu 3 Sep 2026, 14:00 on Discovery .History.
See all current showingsOther current airings
Thu 3 Sep 14:00NASA's Unexplained Files
Saturn's Moon MonstersDiscovery .HistoryThu 3 Sep 15:00NASA's Unexplained Files
Saturn's Moon MonstersDiscovery .History+ 1Thu 3 Sep 17:00NASA's Unexplained Files
Planet Of The Metal AliensDiscovery .ScienceFri 4 Sep 03:00NASA's Unexplained Files
Planet Of The Metal AliensDiscovery .ScienceFri 4 Sep 15:00NASA's Unexplained Files
Planet Of The Metal AliensDiscovery .History+ 1
Saturn's Moon MonstersDiscovery .HistoryThu 3 Sep 15:00NASA's Unexplained Files
Saturn's Moon MonstersDiscovery .History+ 1Thu 3 Sep 17:00NASA's Unexplained Files
Planet Of The Metal AliensDiscovery .ScienceFri 4 Sep 03:00NASA's Unexplained Files
Planet Of The Metal AliensDiscovery .ScienceFri 4 Sep 15:00NASA's Unexplained Files
Planet Of The Metal AliensDiscovery .History+ 1