The Ancient Aleins series delves at the contentious idea that extraterrestrials have been visiting Earth for millions of years. From the age of the dinosaurs to ancient Egypt, from early cave drawings to ongoing mass sightings in the United States, each episode provides historical context for the questions, speculations, provocative controversies, first-hand accounts, and grounded theories that have surrounded this age-old debate. Did intelligent extraterrestrial beings visit Earth thousands of years ago?