Twetos family battles conditions of the Arctic to transport supplies to some of the least-accessible areas of Alaska.

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

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.

Jim and Brooks look for potential landing strips; an Eskimo feast is prepared for returning pilot John Ponts.

The crew races to finish Era's hangar before the winter snow arrives.

Pilot Yuri Ivanoff trains in Bethel for a potential promotion to fly the 208 Caravan, but danger strikes when heavy ice forms on the wings; in Unalakleet, weeks of rain force Jim to do a river landing and a greenhorn arrives.