In this set of three videotapes, writer Graham Hancock traverses the world and explains his controversial theory that an ancient civilization, highly intelligent people who sailed the planet as early as 10,500 B.C., spread advanced astronomical knowledge and built ancient observatories. Skeptics may scoff, but Hancock earnestly points out similarities in giant stone structures in the Egyptian desert and Cambodian jungles, and on Easter Island and in Micronesia, he points out what he considers evidence of an ancient society of seafarers. His ideas may seem utterly bizarre at first, but Hancock presents them in an understated and good-natured manner, and he also makes clever use of computer graphics and aerial photography to illustrate the startling similarities in ancient structures found from the North Atlantic to the South Pacific. At times the three documentaries overlap, and at times they seem like one long program rather than three separate presentations. But throughout, Hancock raises some puzzling questions, and even if you don't buy his arguments, bolstered though they are by mathematical equations and astronomical diagrams, the Quest for the Lost Civilization is an entertaining mixture of archaeology, astronomy, and speculation.