In "Inca Rebellion," Peruvian archaeologist Guillermo Cock examines the dozen of corpses and makes a startling discovery -- they are hastily buried and disfigured by multiple, appalling wounds and fractures inflicted by steel blades and crude bullets. Forensic experts diagnose these remains as victims of a little-known battle that pitted club-wielding Inca warriors against Spanish cavalry. The program reveals the untold final chapter of the conquest, not the Spanish walkover familiar from popular accounts, but rather a protracted and complex war of astonishing brutality that almost led to the Spanish losing their precarious foothold in the Andes.