http://www.youtube.com/watch?v=amqlYJsbr54&playnext=1&list=PL288E7533E7CE5EA7
This is a 14-part playlist, I highly recommend it.
"This documentary is a breathtaking odyssey, stretching from the pyramids of ancient Egypt to South American ruins. From Easter Island to Angkor Wat, Graham Hancock puts forward compelling evidence to suggest that cultures we term ancient were in fact the heirs to an older lost civilization."
akn0ledge (the person responsible for the playlist)
Thanks to Deb Tipton for posting on Atlantis which was my trigger for sharing this wonderful, thought-provoking series.