From the age of dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the United States, each episode in this new series gives historic depth to the questions, speculations, provocative controversies, firsthand accounts and grounded theories surrounding an age-old debate: Did intelligent life forms from outer space visit Earth thousands of years ago?
1: Mysterious Places
2: Gods and Aliens
3: Underwater Worlds
4: Underground Aliens
5: Aliens and the Third Reich
6: Alien Tech
7: Angels and Aliens
8: Unexplained Structures
9: Alien Devastations
10: Alien Messengers