Joe fights the feds while Justin and his crew are stranded in the High Arctic.

When a deadly fire destroys a northern outpost a week before Christmas, Kelly puts aside her personal dilemmas to rally Buffalo to the rescue. Scott and AJ face an onboard alarm.

Roommate pilots Devan and Scott experience a mysterious rise in oil pressure that could destroy one of the C-46's engines. Rookies Andrew and Graeme face the test they've been training for – the chance to get "checked out" as DC-3 co-pilots.

Mikey goes on a Venezuelan treasure hunt for a rare CL-215 waterbomber, and new pilots Andrew and Graeme face their toughest test yet - flying with irascible boss Joe McBryan.

Buffalo launches an all-out campaign to airlift 100,000lbs of essential goods to cut-off northern communities, Justin helps a Mountie move and expectant parents Rod and Sasha show off their 3D ultrasound.

Crusty mechanic Chuck scrambles to ready the Electra for a mission to the High Arctic, and former rampie Audrey returns to Buffalo and reignites the battle of the sexes.

A multi-stop mission to the Far North pits Devan, Scott and Adam in an ongoing battle for fuel and oil as they circuit their destinations. Audrey goes on a northern adventure escorting a team of dog mushers to the 2010 Arctic Winter Games.

Young pilots AJ and Andrew get the chance of a lifetime to fly the DC-3 mounted on snow skis, and tension mounts across the company as Buffalo’s Mackenzie Valley food mail delivery contract is up for renewal.

Buffalo flies the Stanley Cup on a tour of the North, and a licence suspension has Joe looking for a captain to replace him on the passenger run he’s flown for almost 30 years.

Chief pilot Arnie lands the DC-3 on a homemade sand strip at a remote lodge. Electra expert Chuck faces off with a stubborn power unit, and Rod's wife Sasha goes into labour.

When thunderstorms and a shaky engine threaten a charter to Whitehorse, Joe pulls out all the stops to get the passengers to their destination, while baby Emma Rae McBryan visits the hangar for the first time.

A potential Electra plane purchase in Coventry, England has Joe showing Mikey the ropes of international business. New dad Rod misses his daughter while away on a job.

While training pilots for the upcoming fire season, chief pilot Arnie makes an unexpected announcement. Joe and the whole McBryan family head to the Super Bowl of aviation - AirVenture Air Show in Oshkosh, Wisconsin.