A predatory bear stalks a homestead forcing the rancher to aggressively protect himself and his cattle. A jetboat engine failure in the river rapids puts Buck's operation in jeopardy. A violent storm forces bush pilots to make an emergency landing.

A first look at the new season of Alaska: The Last Frontier and the new series River of No Return.

Another mining season brings new methods of finding gold under the sea.

Emily scrambles as her dredge loses power and drifts towards a jetty.

Shawn searches for new ground after novice miners pick his spot clean.

Kris worries that claim jumpers will prevent him from getting rich.

A large storm bears down on the miners, who are reluctant to stop dredging.

A storm hits Nome and the miners use their downtime to make repairs.

Emily risks the life of a diver when she tests her faulty equipment.

Shawn works double time when his crew burns out from exhaustion.

Emily sends expert diver Daryl 40 feet under in a dangerous bid for gold.

Shawn has an ingenious idea to capture more gold as winter approaches.

Shawn takes some dangerous risks in his bid to fund the mega-dredge.

Shawn and Ken meet to discuss their futures as the largest miners in Nome.

The miners persevere through the worst conditions in a decade.

Ken unleashes his 600-ton gold gobbler. Vernon returns with a new dredge.