Bear Grylls takes Russell Brand adventuring across a stunning Scottish isle. They don kilts, and Russell faces his fear.

Bear Grylls helps Cynthia Erivo navigate dangerous caves and raging waterfalls in the Brecon Beacons, one site of Bear’s special forces training.

Bear Grylls takes Rita Ora on an adventure in the Valley of Fire to teach her challenging survival skills.

Bear Grylls invites Daveed Diggs out, tracking a forest ranger who drops a cache of supplies, one of which is Daveed’s biggest fear. It’s also dinner.

Bear takes Academy Award® winner Natalie Portman into the slot canyons of Southern Utah. Their adventure begins when Bear leaps from his helicopter onto Natalie’s 4×4. They trek into the Escalante desert, where Bear teaches Natalie piton placements, rope system transfers and fire starting while descending various canyons. Natalie uses her new skills as they ascend a mountain and attempt to light a signal fire for extraction.

Anthony Anderson joins Bear in the Sierra Nevada mountains. Tossing their backpacks from the helicopter, Bear challenges Anthony to survive with just a rope and compass. On the ground, Bear teaches Anthony navigation and knot-tying skills. On day two, Bear leaves Anthony to use his new skills to secure his climb up a sheer rock face. Anthony will dig deep to make it to their extraction point.

Ashton Kutcher joins Bear to challenge the coastal jungles of Costa Rica. Their adventure begins with a helicopter jump into the Pacific Ocean. Once they swim ashore, they must canoe up a river to fish for their dinner, then descend a 300-foot cliff into the jungle. The next day, Bear sets up a commando crawl rope challenge. Ashton must use all the strength he can muster to cross a massive ravine.

Bear takes Marvel superhero Simu Liu to the Canadian Rockies. As the adventure begins, they must trigger an avalanche to clear a path to a ravine and find an old cabin or risk hypothermia as temperatures drop below -20. The next day, Bear sets the ultimate arctic challenge: Simu must strip down to plunge into a frozen lake and then navigate to a dogsled team to whisk them back to civilization.

Bear puts Rob Riggle through survival tests in the Great Basin to prepare for Rob’s latest movie role. They begin by rappelling from a helicopter to travel west, where Riggle learns the ropes and then faces an even bigger ropes challenge. Once on the canyon floor, Bear teaches Rob river crossing skills, foraging for food and building a rudimentary shelter. The next day, Rob must evade being spotted by Bear or face his fear of skydiving.

Bear takes Bradley into rugged canyons, where Bradley overcomes a series of challenges amidst harsh winds, towering heights and a winter storm.

Bear Grylls invites "She-Hulk" and "Orphan Black" star Tatiana Maslany to face her fears in the middle of Wyoming in winter.

Rappelling from a helicopter, Bear takes Florence Pugh to the volcanic rainforests of Costa Rica. Bear shows Florence how to traverse rapids, test river depth with a rope and rock, and avoid poisonous snakes and deep cliff edges. Crossing an alligator-infested swamp, they catch eel for dinner. On day two, Florence must test the depth of a waterfall pool before choosing to leap from a high cliff into a set of rapids below. Finally, they jump out of an airplane at 10,000 feet to their extraction.

Bear takes Bradley into rugged canyons, where Bradley overcomes a series of challenges amidst harsh winds, towering heights and a winter storm.

Bear Grylls and Troy Kotsur, the first deaf man to win an Oscar, must learn a new way to communicate in the rugged Scottish Highlands.