Legendary adventurer and survival instructor Bear Grylls takes Hollywood actor Zac Efron on an adventure-filled trip into the wilds of the Catskill Mountains.
Pop singer Nick Jonas joins Bear in the Sierra Nevada mountains for sub-zero temperatures, while testing his wilderness survival skills. How will he get on?
'Friends' star Courteney Cox steps way out of her comfort zone in the Irish highlands for the adventure of her life. Will it prove too much to handle?
Musical star Julianne Hough joins Bear in the South African savannah - and she's in for some surprises as she tests her survival skills in the wilderness.
Olympic gold medallist Lindsey Vonn steps off the ski slopes and into the wild. She joins Bear in Corsica - home of some of the most dramatic sea cliffs on...
NBA legend Shaquille O'Neal joins Bear in the Adirondack mountains for an oversized adventure, living rough and surviving on some very unappetising food.
NFL Super Bowl champion Marshawn Lynch joins Bear in the Corsican mountains to see if his football skills hold up in the wild- will he survive the wilderness?
International superstar, 'Scary Spice' Mel B proves she'll do whatever it takes to survive. She joins Bear by the icy Irish Sea, on some of the biggest sea cliffs in...
Movie star Julia Roberts joins Bear on a life-saving "Red Nose Day" adventure in Kenya. They're on a two-day trek enduring blistering savannah temperatures.
Actor Sterling K. Brown steps out of his comfort zone and into the wild. He joins Bear on the icy slopes of the Colorado Mountains, having to hunt for food.
TV star Vanessa Hudgens joins Bear on an adventure in the High Sierras in Nevada. From climbing boulders to handling a deadly rattlesnake, it's no red carpet event.