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- Season 12 overviewApr 28-Sep 15, 201716 episodesSeason 12 episodes16. Return to Gobekli Tepe Sep 15, 2017
- The ancient site of Gobekli Tepe challenges what archaeologists believe about the past.
- 15. The Alien Disks Sep 8, 2017
- Disks are discovered in a cave in China that appear to tell the story of an extraterrestrial crash.
- 14. A Spaceship Made of Stone Aug 11, 2017
- Japan's Ishi-no-Hoden megalith was carved from a single rock and weighs roughly 500 tons.
- 13. The Replicants Aug 4, 2017
- Theorists suggest that aliens designed the human body to be a vessel for otherworldly entities.
- 12. The Animal Agenda Jul 28, 2017
- Researchers suggest that some animals may have been planted here by aliens as part of an experiment.
- 11. Voices of the Gods Jul 21, 2017
- India's Sanskrit texts are filled with descriptions of nuclear physics and other advanced sciences.
- 10. The Akashic Record Jul 14, 2017
- Researchers ask if Cloud computing represents the rediscovery of an ancient repository of knowledge.
- 9. The Majestic Twelve Jul 7, 2017
- A 1952 memo surfaces about a top-secret U.S. government group tasked with investigating UFOs.
- 8. The Alien Frequency Jun 16, 2017
- Researchers find that dozens of megalithic sites were designed to emanate the exact same frequency.
- 7. City of the Gods Jun 9, 2017
- Researchers suggest that the site of Teotihuacan was once home to an extraterrestrial civilization.
- 6. The Science Wars Jun 2, 2017
- Scientists make discoveries that don't fit into the accepted scientific paradigm.
- 5. The Pharaoh's Curse May 26, 2017
- Researchers theorize that the curse on King Tut's tomb came about as the result of alien technology.
- 4. The Alien Architects May 19, 2017
- Theorists explain why ancient architectural marvels bear striking similarities to one another.
- 3. The Mystery of Rudloe Manor May 12, 2017
- Researchers argue that an English manor house is the epicenter of British research into UFOs.
- 2. Forged by the Gods May 5, 2017
- Metal artifacts may provide evidence of extraterrestrials visiting Earth in the distant past.
- 1. The Alien Hunters Apr 28, 2017
- A series of events and sightings prompts U.S. government officials to become alien hunters.