City of the Gods

When a Crystal Skull is discovered beneath the pyramid of the Sun in Mexico, it ignites a cataclysmic chain of events that maroons SG-1 on a dying world. Xalótcan is a brutal society, steeped in death and sacrifice, where the bloody gods of the Aztecs demand tribute from a fearful and superstitious population. But that's the least of Colonel Jack O'Neill's problems. Science Fiction