Overview
Did intelligent beings from outer space visit Earth thousands of years ago? From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the US, each episode gives historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age old debate.
Cast
Episode Guide
No episodes available for this season.
Production Crew
Genres
DocumentaryMysterySci-Fi & Fantasy
First air date
2010-04-20
Seasons
22
Episodes
285
Status
Returning Series