In the late 19th century, demand for fur was in sharp decline. This could have spelled economic disaster for the venerable Hudson's Bay Company. But an idea emerged in political and business circles in Ottawa and Montreal to connect the disparate British colonies into a single entity that would stretch from the Atlantic to the Pacific. With over 3,000 kilometers of track, much of it driven through wildly inhospitable terrain, the CPR would be the longest railroad in the world and the most difficult to build. Its construction was the defining event of its era.

Traverspine is not a place you will find on most maps. A century ago, it stood near the foothills of the remote Mealy Mountains in central Labrador. Today it is an abandoned ghost town, almost all trace of it swallowed up by dark spruce woods that cloak millions of acres. In the early 1900s, this isolated little settlement was the scene of an extraordinary haunting by large creatures none could identify. Strange tracks were found in the woods. Unearthly cries were heard in the night. Sled dogs went missing.

"Dr. Livingstone, I presume?" So goes the signature introduction of New York Herald star journalist Henry Morton Stanley to renowned explorer Dr. David Livingstone, who had been missing for six years in the wilds of Africa. Into Africa ushers us into the meeting of these remarkable men. In 1866, when Livingstone journeyed into the heart of the African continent in search of the Nile's source, the land was rough, unknown to Europeans, and inhabited by man-eating tribes.

In the summer of 1913, the wooden-hulled brigantine Karluk departed Canada for the Arctic Ocean. At the helm was Captain Bob Bartlett, considered the world’s greatest living ice navigator. The expedition’s visionary leader was a flamboyant impresario named Vilhjalmur Stefansson hungry for fame. Just six weeks after the Karluk departed, giant ice floes closed in around her. As the ship became icebound, Stefansson disembarked with five companions and struck out on what he claimed was a 10-day caribou hunting trip. Most on board would never see him again.

In July 1881, Lt. A. W. Greely and his crew of 24 scientists and explorers were bound for the last region unmarked on global maps. Their goal: Farthest North. What would follow was one of the most extraordinary and terrible voyages ever made. Greely and his men confronted every possible challenge - vicious wolves, sub-zero temperatures, and months of total darkness - as they set about exploring one of the most remote, unrelenting environments on the planet. In May 1882, they broke the 300-year-old record, and returned to camp to eagerly await the resupply ship. Only nothing came.