The approaching winter darkness fuels a mass exodus from Unalakleet. In Barrow, a bootlegger attempts to smuggle in illegal liquor and Luke races to complete a daring rescue before the sun sets for two months straight.

Pilot Luke Hickerson transports dangerous chemicals to Atqasuk; Jim makes arrangements for the transportation of the first casualty of winter.

A canine delivery to Iditarod champion Lance Mackey in Fairbanks.

A dangerous frozen river landing leaves Jim and Ferno skating on thin ice, while Ariel's flying lessons end in disaster. The biggest snowstorm of the season hits, shutting down all of Western Alaska and leaving several Era pilots up in the air.

In a dangerous mission, pilot Doug Doherty flies along Russian airspace to transport volatile explosives to the island of St Lawrence. In Unk, Ben slams into a large bird mid-flight.

Unseasonably warm weather sends Jim up to the Brooks Range to look for potential landing strips. Ferno and Ariel prepare an Eskimo feast for returning pilot John Ponts and the week ends with an icy plunge into the Unalakleet River.

In Bethel, construction crews race to finish ERA's newest hanger before the unforgiving winter snows arrive. But when Jim flies in to inspect the progress, he is far from happy. In Unalakleet, fierce crosswinds blow John Ponts' tiny 207 all over the sky.

Halloween in Alaska brings vicious crosswinds that wreak havoc on Era's small planes. Ariel hopes to learn the family business in Unk, but a power blackout tests her abilities when she takes over as station manager.

In the frigid Alaskan town of Unalakleet, the Tweto's and their family-run airline Era Alaska Aviation battle the arctic elements to transport supplies and passengers to some of the most non-accessible spots in North America.

Pilot Yuri Ivanoff trains in Bethel; Jim tries to do a river landing in Unalakleet.