When ice threatens to shut down the rails, pregnant off-gridder Amanda Simpson is left stranded while her friend seeks out supplies. Brakemen Danny and Animal must transport $5 million worth of freight to Anchorage, navigating a wild moose on the rails.

Off the grid brothers, Steven and Jonathon, must fix a collapsing roof on their cabin before a life-threatening snowstorm. Brakemen, Danny and Animal, race to deliver military equipment to Anchorage when a car derails and threatens to shut down the line.

A 20-ton icicle poses a dangerous problem; and a broken rail switch threatens to derail a train and prevent crucial medical supplies from getting through to homesteaders. Source: Destination America

With the spring thaw comes floodwater that threatens to wash away a section of track that Roadmaster Bruce must race to repair. The spring also means bears, which pose a danger to settlers Jim and Nancy as they make their way to the passenger train.