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.

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.

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.

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.

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.

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.

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.

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.

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.