Narrated by Academy Award-nominated actor Josh Brolin, this four-hour high-definition miniseries event explores the Americas like we've never seen them before, giving us an intimate look at some of the greatest wildlife spectacles and against-the-odds fights for survival ever captured on camera. / Soaring mountains, burning deserts, tangled forests and curvaceous coasts. A grizzly bear takedown of helpless elk calves in Yellowstone. Bighorn sheep going head-to-head in battle. Giant Humboldt squid cannibalizing their kin. Puma cubs hunting solo for the first time. The landscapes and wildlife of the Americas are savage, shrewd and stunning. These are the great outdoors, our wildest frontiers … our "Untamed Americas". (Source: National Geographic Channel)