Kate Winslet and Bear tackle Wales' Snowdonia Mountains, as she discusses her upbringing and career. Later, they set up camp in windy conditions and swim in an icy ocean.

Ed Helms (Vacation (2015)) joins Bear in the mountains of Colorado, where Ed confronts his fear of heights and feasts on an unusual dinner.

Michelle Rodriguez and Bear head into the Nevada desert, where they free-fall skydive and scale a huge peak. Later, they find a creative way to remain hydrated, as their water supply diminishes.

James Marsden joins Bear in Utah's Rattlesnake Canyon, where they repel down canyon walls and dine on a chuckwalla lizard.

Michael B. Jordan joins Bear in Wales, where they start their journey by dropping in the ocean.

In the second-season finale, Drew Brees joins Bear for a journey into a jungle in Panama, where they encounter bats in a cave, descend into a remote cavern and wrestle a crocodile.

President Barack Obama joins Bear Grylls for a special trek across the Alaskan wilderness, they chat about the fight against climate change, his relationship with his wife and children and balancing time between work and home.