Alien Tech: Investigation into whether advanced technologies such as lasers and sonic weapons are merely rediscovered tools used by advanced beings in the past. (S2, ep 6)
Alien Evolution: A look at the accounts of modern-day alien abductees. Plus, could the bizarre Paracas skulls discovered by Julio Tello be of extraterrestrial origin? (S8, ep 5)
The Genius Factor: History's greatest geniuses have often said their ideas came from visions or hallucinations. But could they have come from aliens? Experts investigate. (S7, ep 5)
Aliens And Stargates: Experts investigate remote ruins, mysterious caves and legendary mountain portals. Could these alleged stargates have brought ancient aliens to Earth? (S6, ep 5)
Monoliths: A look at how ancient man could have built huge stone monoliths without advanced tools or technology. Could they have had extra-terrestrial help? (S5, ep 5)
The Nasa Connection: Experts open up NASA and secret government files. Can they find proof of alien contact in the recent or ancient past? (S4, ep 5)
Aliens And Mysterious Rituals: Experts question whether the notion of rituals, such as funerals and festivals, was brought to earth by ancient extraterrestrial visitors. (S3, ep 5)
Aliens And The Third Reich: During WWII, rumours spread that an aircraft had been built from extraterrestrial blueprints. Were aliens helping Hitler's quest for world domination? (S2, ep 5)
Dark Forces: From Rasputin to the Nazis, many people throughout history are thought to have tapped into dark powers. Could they have been connecting with extraterrestrials? (S8, ep 4)
Aliens Among Us: Are we being watched by otherworldly beings? Experts make surprising discoveries as they explore the ancient past for evidence of alien overseers. (S7, ep 4)