If ancient aliens visited Earth, what was their legacy, and did they leave behind clues that exist in plain sight such as sophisticated aircraft, complex electrical grids, and intricate construction machinery?

Starring:

William Henry, Robert Clotworthy, Andrew Collins, Nick Pope, Erich von Däniken, Linda Moulton Howe, Philip Coppens, David Childress, Mike Bara, Jonathan Young, George Noory, 8 more, Nick Redfern, Robert Schoch, Michael Dennin, Hugh Newman, Giorgio A. Tsoukalos, David Wilcock, Bill Birnes, Ariel Bar Tzadok

Genre: