Orange Is the New Black actress Uzo Aduba joins Bear for a heart-stopping adventure confronting steep cliffs, deadly predators and punishing weather in Spain's remote Pyrenees mountains.

World champion tennis player Roger Federer joins Bear for a thrilling match with Mother Nature as they take on frozen waterfalls and towering cliffs in a memorable trek through the Swiss Alps.

Actor Scott Eastwood joins Bear for an exhilarating two-day adventure through an ancient labyrinth of cliffs and treacherous caves deep in the Balkan Peninsula.

Dancer and actor Derek Hough joins Bear for a dizzying adventure through Bulgaria's Rila Mountains, where they take on towering peaks and freezing waters and even learn a few dance moves.

Actor Don Cheadle tackles the unrelenting White Mountains of New England as Bear pushes him to leap outside his comfort zone across rugged and remote terrain teeming with dangerous animals.

Actress Lena Headey joins Bear on a two-day expedition through the unforgiving landscape of the Iberian Peninsula, where they tackle some of Spain's sharpest cliffs and iciest waters.