Standing tall over the Egyptian sands for centuries, the Great Pyramid has mystified us ever since its secrets died with its creators. A&E's Ancient Mysteries examines the mammoth stone structure and its siblings at Giza and asks the big questions: Why were they built? How were they engineered? What message do they carry? Narrator Leonard Nimoy richly captures the excitement of the quest, and interviews with both conventional and cutting-edge archaeologists illuminate the state of our knowledge (and ignorance) of the Pharaohs and their plans. Were the Pyramids really just enormous tombs? Evidence mounts that, like Stonehenge and other improbably large stone monuments, the Pyramids may have been used astronomically, with tiny shafts pointing at stars of significance thousands of years ago. See the pieces put together before your eyes and judge for yourself. --Rob Lightner