Kate Hudson teams up with Bear Grylls for a harrowing trek across the Italian Alps.

Modern Family star Jesse Tyler Ferguson joins Bear Grylls on a snowy survival trek across Europe's jagged South Tyrol.

Academy award winner Kate Winslet follows Bear Grylls on a harrowing trek through Wales' Snowdonia mountains.

Bear Grylls and Ed Helms copter in to conquer the high country of Colorado.

Fast and Furious star Michelle Rodriguez pushes the boundaries of adventure as she and Bear Grylls journey across the high desert of Nevada.

Bear pushes film star James Marsden to the limit as they trek through the wild canyon country of Utah.

Fantastic Four star Michael B. Jordan braves a pounding surf, towering cliffs and freezing nights as he and Bear Grylls venture through the highlands of Wales.

NFL star Drew Brees heads with Bear to the jungles of Panama for a treacherous trek, filled with snakes, crocodiles and quicksand.

Bear and President Obama venture into the wilds of Alaska, sharing stories and conversing on everything from fatherhood to climate change.