Deep in the heart of Louisiana lies America's largest swamp, a million miles of inhospitable bayous, marshes and wetlands where nature rules and humans struggle to tame it. Many of its inhabitants are the hardened descendants of French refugees who were forced out of Canada in the 18th century and settled in this harsh yet majestic environment. Follow these swampers through a time of year that is crucial to their survival The 30-day alligator hunting season. In Season 4, with the start of the hunting season delayed in the aftermath of Hurricane Isaac, the Swamp People face a new foe an invasion of new blood from Texas vying for their share of alligators. The Cajun hunters of Louisiana respond as they always do in their most difficult season yet - by relying on their traditional skills and the strong family bonds that stretch back to America's pioneer days.