Wildlife presenter Steve Backshall tracks down some of the world's deadliest animals.
Steve boards an Arctic icebreaker in search of the Arctic's top predator—the polar bear.
Steve Backshall rappels into a glacier and has a close encounter with a humpback whale.
Steve tracks grey wolves in Yellowstone Park and braves North Carolina's icy rivers.
Steve goes fishing for an alligator gar, the largest freshwater fish in North America.
In the crystal clear waters of Guadalupe Island, Steve swims with the great white shark.
Steve meets a shark with a fearsome reputation and swims alongside humpback whales.
Steve has a hair-raising encounter when a tiger shark gets a little too friendly.
Steve has a chilling encounter with a spider that can reach the size of a dinner plate.
Steve and the crew continue their journey south, island-hopping across the Southern Ocean.
Special episode looking at the best encounters Steve and the crew had on their journey.