Join experts Giorgio Tsoukalos, William Henry, and Jason Martell as they embark on a global investigation, revisiting the series archives of "Ancient Aliens" to explore the most enigmatic archaeological sites, including Giza, Puma Punku and others.

Ancient Astronaut theorists Giorgio Tsoukalos, William Henry, and Jason Martell reveal the most compelling evidence of ancient flying machines and explore the possibility that these extraterrestrial encounters have persisted throughout the ages.

Are we truly alone in the Universe? Ancient Astronaut theorists propose that descriptions of sky gods and star beings might reflect real encounters with extraterrestrial visitors in the remote past. Could this be true?

Based solely on Charles Darwin's Theory of Evolution, the rapid development of modern humans seems impossible without a 'missing link.' Could this link involve extraterrestrial intervention?

Might these mysterious locations validate ancient legends of underground realms inhabited by extraterrestrial beings? And if so, what other otherworldly secrets might lie beneath our feet?

There is intriguing evidence history suggesting the existence of intelligent defence systems seemingly protecting Earth. Could all of these weapons have originated from... an alien arsenal?