Running Wild With Bear Grylls

Actor Joseph Gordon-Levitt tackles Kenya's unyielding terrain with Bear Grylls. Dropped into the elements from a helicopter, Joseph and Bear navigate a perilous rappel, milk a camel for needed hydration, and ascend a massive rock dome that tests Joseph's fear of heights like nothing before.

Actress Keri Russell joins Bear on an epic journey to the Canary Islands off the coast of Africa. After battling the dangerous, rolling rocks of a massive volcano, the duo descend into a mysterious canyon where they source a meager dinner of undigested seeds from a pigeon carcass, and test their luck with a grappling hook to escape the towering canyon walls.

Bear takes Lena on the ride of her life as they paramotor deep into the remote Spanish wilderness. Continuing on foot, they traverse a towering, razor-thin ridge before a dead-end forces a harrowing rappel.

Actor Don Cheadle joins Bear on a journey through the white mountains of New England.

"World of Dance" judge Derek Hough joins Bear on a whirlwind adventure across the mountains of Bulgaria.

Actor Scott Eastwood joins Bear on a journey through the harsh Bulgarian outback.

Roger Federer journeys through the Swiss Alps with Bear; a frozen waterfall; table tennis.

"Orange is the New Black" star Uzo Aduba joins Bear on a harrowing journey to Spain's Pyrenees Mountains.