Going to the most remote, cold and inhospitable places on the planet to reveal great mysteries that were once frozen in time.
The search for missing mountaineer Janet Mae Johnson, from 1973, gains momentum with the discovery of her backpack and camera in 2020. (S4, ep 1)
In Siberia, a 44,000-year-old wolf, perfectly preserved in permafrost, may hold secrets about Ice Age bacteria and ancient microbial life. (S4, ep 2)
Travel to the most remote, uninhabitable parts of Earth to reveal great mysteries that have been frozen in time. (S4, ep 3)
In the Swiss Alps, a Roman dagger discovery reveals a 2,000-year-old battlefield where the Suanetes tribe fell to the Roman Empire. (S4, ep 4)
Mauro De Mauro's disappearance in Italy reveals remains in a Mount Etna cave, linked to mafia ties and a 1962 assassination. (S4, ep 5)
A Dutch fluit shipwreck found in the Gulf of Finland reveals rare insights into 1600s maritime trade and naval architecture. (S4, ep 6)
A Swiss fisherman uncovers ancient Celtic relics in Lake Neuchatel, hinting at a violent Iron Age battle around 225 BCE. (S4, ep 7)
A 1700-year-old death mask from Siberia reveals ancient cranial surgery, shedding light on advanced medical practices of the Tashtyk culture. (S4, ep 8)
Floods in Uttarakhand raised fears of buried Cold War nukes, but scientists linked it to a glacier collapse and environmental impacts. (S4, ep 9)
Artifacts like glass shards and a writing slate from the tragic Donner Party of 1846 have been recently uncovered in the Sierra Nevada. (S4, ep 10)