Visits to the most remote, cold and inhospitable places on the planet to reveal great mysteries that have been frozen in time. This edition features a giant naval vessel located on the bottom of the Norwegian Sea and an ancient reptile-like creature found in the permafrost of Canada's Arctic. In Scotland, archaeologists are drawn to a strange, figure-eight shaped ditch, while an Antarctic research base finds itself suddenly surrounded by blood-soaked snow.

A secret military base is discovered a few hundred miles from the North Pole, while a man-made stone formation is found 120-feet below Lake Huron.

A group of hikers trekking across the Italian Alps stumble upon abandoned military infrastructure. What purpose did these camouflaged buildings serve?

Mysterious industrial waste is discovered in an uninhabited part of Greenland. Meanwhile, strange mounds are found deep within the Arctic Circle. 

Bizarre ice formations in the Antarctic Ocean are investigated and a discovery off the east coast of Canada may be connected to a tragic event. In the most remote, cold, and inhospitable places on the planet, scientists and adventurers have uncovered mysteries that have been frozen in time.

A team attempts to locate a British Second World War aeroplane that went missing in Iceland. Plus, in Russia, 34,000-year-old graves are discovered.

Visits to the most remote, cold and inhospitable places on the planet to reveal great mysteries that have been frozen in time. This episode considers Ecuador's mountain mystery.

Archaeologists in Russia find several mass graves, a Second World War plane sits on a Canadian mountain and cosmic rays in Antarctica have experts stumped.

In a Danish bog, hundreds of mutilated ancient bones are found, while a mysterious deserted island belonging to Russia is explored.

A grim discovery in a Swedish lake reveals shocking ancient practices. Meanwhile, in the Canadian Arctic, the fossil of a previously unknown mammal is found.