This in-depth documentary hosted by writer Michael Wood traces the 15th-century expeditions undertaken by such famous Spanish explorers and conquerors as Hernan Cortes, Cabeza de Vaca and Gonzalo Pizarro, depicting the hardships they faced, as well as their controversial role in the overthrowing of the Aztec and Inca empires. 4 hrs. Widescreen; Soundtrack: English.