Episode list

Chris Sharma has been at the top of the sport climbing game for 15 years, but 19-year-old prodigy Adam Ondra is hot on his heels. The legend and the young contender team up in Catalunya, Spain, trying to establish the world's hardest route.

For a decade, Hans Florine and Dean Potter have one-upped each other in a wild race for the speed record up The Nose, a 3,000ft route on El Capitan in California, USA, each taking increasingly enormous risks to reclaim the title.

Slack-lining was born as a rest-day pastime for dirt-bag climbers, but wild man Andy Lewis has a vision to elevate this laid-back form of balancing on a line to a full-blown art form and adventure sport. From freestyle tricks that have spawned a competition circuit, to spectacular unprotected death-walks a thousand feet above the ground, plus horrifying BASE stunts, Sketchy Andy is leading a slack-lining revolution. It's part genius, and part insanity.

Ueli Steck is one of the world's fastest alpinists, but his latest quest could cement his place among legends. Ueli attempts to break the speed record on the north face of The Eiger, Switzerland with only crampons and axes in a sprint to the peak.

Climbing wide cracks is a brutish and peculiarly American pursuit, practiced by a small band of burly misfits. Now two Englishmen, Tom Randall and Pete Whittaker, are on a mission to master this bizarre form of climbing. After two years of compulsive training in their tiny cellar, the underdogs travel to The States to do battle with the hardest "offwidth" climbs.

Nine-year-old New York City native Ashima Shiraishi is already one of the world's strongest female climbers. Under the tutelage of her coach, Obe Carrion, she crushes all competition and blows minds with her top-end ascents on her first outdoor climbing trip. Along the way, Carrion finds redemption by teaching Ashima the lessons he was never able to learn himself.

Canadian Will Gadd and Brit Tim Emmett discover a whole new universe of ice climbing at Helmcken Falls, British Columbia, where a 500 foot waterfall sprays the underside of a gargantuan cave awith fantastical, barely climbable ice formations. For Gadd, it's the culmination of 30 years of exploration, as the pair establishes the hardest routes ever done on ice.

Forty-three-year-old Yuji Hirayama is one of the great legends of modern climbing. Near retirement, he plans one big swan-song mission to complete one of his hardest projects ever: climbing the spectacular summit of Mount Kinabalu on the island of Borneo. But first he must find the right partner. Enter Daniel Woods, the young American boulderer who is one of the strongest humans but lacks mountain experience. Daniel-San travels to Japan to prove himself worthy of Hirayama's mentorship.

After Woods demonstrates his raw talent to Hirayama, the pair travel to the island of Borneo to conquer and establish new routes on Mount Kinabalu. While the brutal conditions 13,000 feet above sea level challenge both student and master, Woods and Hirayama wake up day after day to climb hard and push the limits of the human body to its farthest reaches.

The UK climbing scene is known for its strict traditional ethic, yielding dangerous routes and a competitive machismo among the driven young climbers risking it all to prove their boldness. It is the last place you would expect to find a nice little blonde girl putting all the lads to shame, but Hazel Findlay is doing just that. The first woman to climb the British grade of E9 (super hard, super sketchy), Hazel is a connoisseur of loose rock, dodgy gear, and big run-outs. Having mastered the scrappy sea cliffs at home she teams up with Emily Harrington to tackle the massive, untamed big walls of Taghia Gorge, Morocco.

Mount Everest made headlines around the world in Spring 2013 when Ueli Steck and Simone Moro, one of the strongest duos in alpinism, were attacked by a crowd of angry Sherpas at Camp 2 while attempting a cutting edge new route on the highest- and most crowded- mountain in the world. Fearing for their lives, the climbers fled the mountain.

Follow Chris Sharma, the world's strongest climber, on his ultimate quest to make first ascents of the greatest unclimbed walls on earth. Across the Americas and Europe, Sharma discovers and climbs the most improbably rock formations, until he finds the ultimate challenge: a massive rock arch rising out of the Mediterranean Sea that he will attempt to climb without a rope, crashing into the waves below if he fails. If he can climb the arch, it will be the most difficult rock ascent ever achieved.

After attempting the formidable Mediterranean deep-sea arch, Chris Sharma knows he must hone his skills in order to complete his dream first ascent. Sharma travels to Venezuela and to the boulders of Bishop, CA to develop the prowess needed to ascend the deep-sea arch, before returning to his ultimate nemesis for his attempt at glory. King Lines was filmed over three years, in order to document Sharma's entire journey.