After a massive overnight blizzard, conductor Jim and engineer Jordy are hauling $50 million worth of freight from Vancouver—straight into the heart of the avalanche zone. High in the mountains, avalanche technician Derek makes a startling discovery and prepares to detonate a man-made snow slide. The snow-removal crew tackles giant ice columns that could spell disaster for passing trains. And, after the avalanche bombing, it's all hands on deck. Meanwhile in Ontario, off-gridder George fills an entire car with firewood for delivery to an isolated Northern community.

After loading up 112 cars, veteran engineer Rob and rookie conductor Keri must guide their two-kilometer grain train into the heart of the ice-encrusted Rocky Mountains, through steep terrain and a notorious tunnel, and finally to a transport ship waiting in the Port of Vancouver. Down the line, workers are called in to blast heavy snow off the tracks, a frozen switch refuses to budge, and it's a race against time as track crews have just one hour to replace a faulty rail. Meanwhile, at the edge of Ontario's Arctic wilderness, another crew is transporting a massive polar bear trap to a remote community with a predator on the loose.

Conductor Grant and engineer Jeff race their empty train east to collect a $3 million shipment of coal. And once the 152 cars are filled, they've got to get their mammoth convoy back over the mountains. Ahead of them in Glacier National Park, an avalanche warning forces snow removal crews to a halt. Railroad engineer Kent prepares for a high-altitude bridge inspection. And while the team races to replace a cracked junction, Jimmy's lack of discipline threatens to derail the operation. Meanwhile in Ontario, electrical issues on board the Polar Bear Express could leave Moosonee's minor hockey league out in the cold.

A spike in the temperature threatens Rocky Mountain's shipments. The team struggle to shore up the track after mudslides and washouts devastate the rail-line.

Winter may be over but spring presents a whole new set of dangers on the Rocky Mountain railroad. Lethal rockslides threaten Canadian Pacific's longest and heaviest train.

Canadian Pacific freight crews tackle one of their most challenging loads. The team attempts to haul a 210-tonne reactor on an epic cross country journey.

It's spring in the Rockies and the repair teams are out in all force. Veteran conductor Jordy Hunter must dodge the operations in order to make his delivery on time.

It's Canada's 150th birthday and to celebrate, the Canadian Pacific Railway is taking a perfectly restored, vintage train on an epic journey from coast to coast.