Bear Grylls takes on the wild with actress Brie Larson. They must navigate a dangerous swamp filled with crocs on Pearl Islands, Panama.

Film and TV funnyman Joel McHale joins Bear as they navigate a dangerous slot canyon in Arizona.

Bear and his guest, model and actress Cara Delevingne, take on the mountains and waterfalls of Sardinia, Italy. They also catch a rat for dinner.

Bear and his guest, ex 'The Daily Show with Jon Stewart' correspondent and former U.S. marine who served in Afghanistan, comedian Rob Riggle, take on Iceland's biggest glacier in midwinter. They also try pemmican and a reindeer head.

Bear Grylls explores the wilderness of Sardinia with actor Armie Hammer.

Bear Grylls and actor Dave Bautista navigate the Glen Canyon in Arizona.

After their adventure in season one, Bear Grylls and actor Channing Tatum reunite to explore the mountains of Norway.

Free Solo rock-climber Alex Honnold joins Bear Grylls for a breathtaking adventure through the Swiss Alps! Alex is no stranger to dizzying heights, but he's not use to falling from them, so Bear kicks off the journey with a skydive into the jagged mountains.

On-Air radio personality Bobby Bones joins Bear Grylls for the adventure of a lifetime in a massive Norwegian Fjord. A helicopter ride into the mountains is where their journey begins but from there, danger lurks at every turn - from giant rock domes and deadly bogs to raging rivers with currents strong enough to move cars. On top of that, the only way to reach their extraction is a 300-foot waterfall rappel that leaves even Bobby speechless.

Actor Zachary Quinto and Bear battle the Panama jungle