About this showing of NASA's Unexplained Files
When NASA begins an experiment to communicate with dolphins, experts examine if it's a prelude to making alien contact. Will it have dire consequences.
Previously on TV
NASA's Unexplained Files
Secrets Of The Alien Signals
Previously shown on Discovery .History on Wed 9 Sep 2026 at 14:00.
This showing has ended
This showing was on Discovery .History at 14:00 on Wed 9 Sep 2026. See future airings below or open the main programme page for the latest TV times.
Airing details
ChannelDiscovery .History
StartsWed 9 Sep 2026, 14:00
EndsWed 9 Sep 2026, 15:00
Episode / edition: Secrets Of The Alien Signals
Next showing of NASA's Unexplained Files
The next currently listed showing is Sun 13 Sep 2026, 03:00 on High Street TV 4.
See all current showings