The chase teams have one last chance to achieve their goals for the season.

The Twetos brave the elements to deliver supplies to inaccessible areas.

Jim arranges to transport the casket of the dark winter's first casualty.

The Tweto family takes full advantage of Alaska's summer conditions.

The pilots brave the elements as hurricane-force winds roar into Alaska.

A Greenhorn pilot goes on the most challenging run of his short career.

The guys cope with an influx of teachers after the first snow.

Pilots embark on two white-knuckle flights involving something explosive.

Ariel's flying lessons end in disaster after a hard day of work.

Ariel attempts to learn the family business as Halloween takes over Alaska.

Luke takes on a daring rescue as winter's darkness overtakes Unalakleet.

A rocket is attached to a '67 Chevy and fizzy candy is combined with soda.

Exploding biscuits and getting stuck to an airline toilet are investigated.

A chair tries to fly with balloons and Jaime gets covered in gold paint.

The guys look into ice bullets, running in the rain and exploding toilets.

The guys test silicone implants at altitude and cellphones at the gas pump.