Joe gets a lucrative late-season contract to fly mining equipment to an airstrip on a frozen lake, sending C-46 and DC-4 crews on a race against the spring melt. But conflict erupts between Devan and a senior pilot. And when the client reports an on-site incident, Joe goes on the warpath. Though Jeremy has missed a number of flight attendant classes, he's confident he can catch up to fellow rampies Audrey and Wilf. But too much confidence just may be a dangerous thing. And over the North Atlantic, Arnie, Justin and Cory press on to Turkey, even though they have only half of the spare parts in their plane. But there are some serious volcanoes and busy Mediterranean air traffic ahead.

Cargo manager (and unofficial Buffalo den mother) Kelly has problems enough when Jynelle's holiday leaves her shorthanded. But when her engineer husband Juan quits on the spot after a blowout with Joe, Kelly is left in a terrible position. Will Kelly stay - or will she go? Scott also gets bad news: he must stand down from flying so a rival co-pilot can be fast-tracked to captain. Scott pulls out all the stops to secure a new contract flying practically to the North Pole, which will get him back in the pilot's seat. But his rival is also interested in this new dream job - flying the C-46 to Eureka, a tiny research station at the top of the world. And after nine months of brutal work and tough luck, Jeremy sees light at the end of the tunnel. Buffalo needs a new DC-3 co-pilot, and contrary to expectation, he's getting a crack at it. But first, he's got to pass the test of flying with Joe.

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.

Joe hires outsider Duane Hicks to help Buffalo navigate the future and coach Mikey. Gord and Sean's DC-3 delivery mission to the High Arctic goes awry when blizzard conditions and a broken oil cooler force an emergency landing.

Buffalo gets into the stunt flying business when veteran pilot Arnie flies the DC-4 for the re-enactment scene of a famous WWII bombing raid. A routine C-46 flight becomes dangerous when a hole in the plane's aging exhaust system sets off the fire alarm, and Devan has to decide whether or not to shut down an engine mid-flight.

Critical of the many stops and starts in the Electra program, and frustrated with the constant drama at Buffalo, Chuck quits. Joe clashes with the maintenance department when a series of delays puts the sale of an old Canso waterbomber in jeopardy. Mikey goes on an ATV hunting trip and Rod babysits his daughter, Emma Rae, while his wife Sasha goes to a wine gala in town.

Frustrated with her lack of flying and stuck in a rut as a courier driver, Audrey decides her time at Buffalo is over. Devan, Ian and Jimmy deal with a hydraulic fluid leak in the C-46 on the valley run, which forces Jimmy to crawl into the "hell hole" and crank down the landing gear by hand.

When a ferry breakdown causes a gasoline shortage in Yellowknife, new manager Duane begs Chuck to return and prepare the Electra for a fuel haul. Cory leads a clandestine rescue mission to retrieve an abandoned C-46 and Mikey escapes to Ottawa for a birthday joyride in a fighter jet.

Duane lands a huge contract for the Electra and puts enormous pressure on mechanic Adam to prep the plane without the help of his mentor Chuck. Kelly plans her Mexican wedding, but Jynelle's sudden resignation leaves her in the lurch. The power goes out in Yellowknife, spurring Joe into crisis mode.

The Electra flies to Alert, the northernmost settlement on Earth, forcing Adam and new senior manager Duane to work things out. Hay River rampie Tyler is on the fast track to a co-pilot seat, but first has to prove his flying ability to Buffalo's new chief pilot, Justin.

Sparks fly when Joe discovers Gord has taken a job with a rival airline after completing expensive training on one of the Buffalo planes. Larry, a rookie rampie, makes a near fatal error while training on the C-46. A desperate search is launched for elusive C-46 parts.

Trying to make his mark at Buffalo, Duane lands two more Electra contracts. But his over-zealous efforts result in a clash with the crew and with Joe, and a down-to-the-wire midnight departure to meet a deadline. Rookie DC-3 co-pilot Tyler discovers that landing the big plane takes practice.

Duane's decision to leave the Electra crew unsupervised while he spends time at home jeopardizes the completion of a major contract, and could cost him his job. Young DC-3 co-pilot Graeme sees his chance to move up to a bigger plane disappear when he falls out of favour with Joe.

Mechanic Jimmy is sent to a northern mining camp to create an ice landing strip on a remote lake where AJ will have to land a DC-3 and the much bigger C-46. New co-pilot Tyler faces the ultimate test – flying the sked with Joe. And Mikey turns the Buffalo hangar into a playhouse for his niece’s first birthday.

Engine troubles on the C-46 during the valley run force Devan to shut down an engine. High winds wreak havoc for Devan and his crew on another C-46 mission to help clean up an oil spill in the Northwest Territories. Scott trains on a CL-215 waterbomber and visits his mentor Arnie, then joins the waterbombing crews when Buffalo is called in to fight a massive fire in Alberta.

Rookie waterbomber pilot Scott gets his first taste of action when Buffalo responds to an emergency callout to fight fires in Alberta. Mikey and Rod think they hit the jackpot when they buy a million dollar firefighting plane on eBay at a bargain price. Joe marks his 50 years of flying by returning to the place he grew up in his historic Norseman. And Arnie shows up in Yellowknife to cheer on daughter Caitlin in a cancer fundraiser.

Joe performs stunt landings for a film crew; new employee Ryan tries to prove his worth in Hay River; a dental hygienist gets thrown into the hot seat.

Canadian Prime Minister Stephen Harper visits Buffalo Airways; Joe clashes with inspectors; the Electra crew flies to Sachs Harbour for a meaty assignment.

Weighed down by the responsibility of training a new rampie, and struggling to get out of Joe's doghouse, DC3 co-pilot Tyler gets a once in a lifetime opportunity to stunt fly in his Cessna 180 for a visiting film crew. Meanwhile another Buffalo co-pilot, Andrew, is up for a job with Cathay Pacific Airlines. The last time a pilot left, Joe took it personally.

After taking command of an intense airlift, and dealing with the ugliest Electra load he's ever seen, Scott takes a scary fall on the icy tarmac. City girl Christine moves to Yellowknife to give the unglamorous rampie life a shot, firebrand mechanic Chuck returns to the Buffalo hangar and immediately stirs the pot, while Joe helps out an old friend, "Ice Road Trucker" Alex Debogorski.

A week before Christmas, Buffalo agrees to lend a hand to an RCMP initiative to fly toys to isolated communities in the north. But a series of problems with the Electra leave the company in a jam. An excess of holiday freight overwhelms cargo manager Kelly, and despite a visit from her buddy Arnie Schreder, recovering from his cancer treatment, her stress peaks after a clash with Joe.

Just months from retiring, Electra captain Ray Weber leads his crew on a multi trip mission that requires landing on a rough ice strip on a remote lake. The ice strip landing goes fine, but when the plane takes off from the strip, the right landing gear gets stuck in the wheel well. Ray and his crew try to get the wheel down but to no avail, and are forced to perform an emergency landing that they'll never forget.