Es una serie de televisión estadounidense que se estrenó el 20 de abril de 2010, en el canal History.1 Producido por Prometheus Entertainment, el programa presenta la hipótesis de los antiguos astronautas y propone que los textos históricos, la arqueología, las enseñanzas espirituales y diversas leyendas contienen pruebas de que en el pasado el ser humano tuvo contacto con civilizaciones extraterrestres.,2 3 mediante argumentos y explicaciones extraídas de documentos antiguos, creencias religiosas y acontecimientos históricos bíblicos.
Alienígenas ancestrales (Temporada 17)

The Lost City of Peru (Episodio 1) 6.0
Fecha de emisión: 2021-08-06
Duración: 40 min
Sinopsis: Giorgio A. Tsoukalos, David Childress and William Henry examine a recently discovered lost city in Peru that has upended the historical timeline of South America, revealing that civilization emerged thousands of years earlier than previously thought.

Top Ten Mysterious Sites (Episodio 2)
Fecha de emisión: 2021-08-13
Duración: 40 min
Sinopsis: Ancient Aliens is counting down the world's top ten most mysterious sites, from the towering Moai statues of Easter Island to the enormous megalithic blocks of Stonehenge to the precision cut stones of Puma Punku. Could these extraordinary places provide evidence of extraterrestrial visitation?

Top Ten Alien Cover-Ups (Episodio 3)
Fecha de emisión: 2021-08-20
Duración: 40 min
Sinopsis: Ancient Aliens is counting down the world's top ten alien cover-ups, from the famous Roswell Incident to a secret military base rumored to be housing ET technology to recently released UFO videos captured by cameras on Navy fighter jets. Has there been a massive cover-up regarding the truth about an extraterrestrial presence on Earth?

The Mystery of Mount Shasta (Episodio 4)
Fecha de emisión: 2021-09-17
Duración: 40 min
Sinopsis: Examining the unique geology and location of Mount Shasta in northern California, to determine why it is known as a hotbed of strange events, from Bigfoot sightings to UFO encounters to hikers vanishing without a trace.

The Human Experiment (Episodio 5)
Fecha de emisión: 2021-09-24
Duración: 39 min
Sinopsis: Scientists now know that seven human-like species lived alongside Homo sapiens for thousands of years. But why is it that only humans survived? Is it possible that we were the product of extraterrestrial experimentation? Ancient Astronaut theorists Giorgio A. Tsoukalos. David Childress and William Henry will be joined by Rabbi Ariel bar Tzadok and filmmaker Caroline Cory to investigate the mystery of the Human genome. in an attempt to determine if human beings are the product of an extraterrestrial experiment. Might the ultimate proof we are not alone in the universe be hidden in our own genetic code?

Top Ten Alien Encounters (Episodio 6)
Fecha de emisión: 2021-10-01
Duración: 40 min
Sinopsis: We're counting down the world's top ten alien encounters, from the first reported abduction event to mass UFO sightings over New York's Hudson Valley to an incident in ancient Rome that changed the course of human history. Could these incredible accounts be actual encounters with visitors from the stars?

Top Ten Alien Artifacts (Episodio 7)
Fecha de emisión: 2021-10-08
Duración: 40 min
Sinopsis: An ancient figurine of a modern-day airplane. A primitive statue of a man in a spacesuit. Mysterious crystal skulls whose origins are entirely unknown. For more than a decade on Ancient Aliens, we've traveled the globe and investigated strange objects found on every continent on Earth. We're counting down the top ten alien artifacts. Objects that could provide evidence that extraterrestrials once walked among us.

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