John Ponts fights heavy turbulence and angry passengers on a flight through the Nulato Hills. Jim and Ferno's leave the terminal in the hands of the pilots and Sarah's flight to rescue a villager lost in a storm turns into a battle for her own survival.

Two pilots push their limits to land vital vaccines two miles from Russia on Alaska's most treacherous runway. In Unalakleet, Ariel Tweto takes to the skies once again and proves that she still has a lot to learn.

Two pilots attempt to deliver a specialty drill through a sea of fog. Luke brings the first ever ATM to Wainwright, along with a planeload of cash. Erik races to deliver passengers and critical supplies before a spring storm shuts him down.

After two months of darkness, the villages of Western Alaska are desperate for fresh supplies. Jim attempts a risky landing on a frozen river and Luke has problems getting his plane in the air. A pilot flies to the Russian border to deliver vaccines.

The Iditarod dog sled race brings big business to Era Alaska. Ferno, Ayla and Ariel Tweto run with the reindeer in Anchorage. A pilot battles malfunctioning trim control over the frozen Norton Sound and a tsunami warning threatens the entire West coast.

A group of world-renowned rock climbers arrive in Unalakleet and Jim must fly them deep into the remote Brooks Range.

Jim searches for a group of missing mountain climbers lost somewhere in Alaska's Brooks Range.

Era Alaska provides aid to a village devastated by heavy flooding. Two pilots get lost in a sea of fog off the Russian coast while trying to deliver desperately needed ammunition. In Anchorage, Jim's prized Cessna 180 goes up in smoke.

Ponts' old skate crew arrives to build a skate park for local kids on Unk's newly paved roads. Ariel takes to the skies in a new plane with dangerous results and lead Pilot Erik Snuggerud battles heavy turbulence with a very special delivery.

Two pilots carry propane to a secluded fishing lodge; Luke wrestles with failing equipment over the tundra; Ponts challenges Ariel to execute a perfect landing.

Ariel looks for seagull eggs; Erik has a rough flight over a notorious runaway; Sarah takes her first flight in a 208.

Era Alaska ferries fire crews to combat wildfires across the state; Ariel flies solo for the first time; Ponts navigates a deadly pass on his first training flight.