Jack Osbourne, first son of the world’s most famous TV family, is on a mission. He wants to take on one of the planet’s most extreme climbing challenges – El Capitan in Yosemite National Park.

El Cap is a vertical kilometre of sheer rock in California’s Yosemite Valley - an extreme undertaking even by the standards of hardened professionals. Jack will make this climb spending five days on the rock face, sleeping each night on tiny portable ledges thousands of feet above the ground.

There is a small snag in this plan - Jack is virtually a complete novice at climbing, unfit and about 56 lbs (25 kilos) overweight. He’s devised a plan to reach his aspirational goal.

As part of this phase of the plan Jack and Mike try their hand at any thrill seeking activity to beef Jack’s confidence and strengthen his body and nerve before he faces his Grand Finale – the El Capitan climb itself. Confronted with some of the most strenuous climbing imaginable, viewers will be taken to the very limit as they watch Jack run through a gamut of emotions from naked terror to pure elation.

Why is Jack doing this? Jack discovered his love of the outdoors whilst filming in the mountains of Slovenia for Channel 4’s Extreme Health Farm (aka Extreme Celebrity Detox) and his natural aptitude for the rock climbing challenges. The question now is - will he have the fitness and nerve to see it through to El Captain?

This fast-paced, thrilling and intimate series also features exclusive and in-depth interviews with Sharon and Ozzy Osbourne. This is the story of Jack’s very personal journey from celebrity brat to rugged man as he prepares for a journey few people would dare to take on physically and mentally. In the process his joys, tears, heartaches and triumphs are all captured as he faces dangerous, tough conditions and apparently insurmountable challenges. Adrenaline soaked, fast-paced and funny Jack Osbourne Adrenaline Rush is compelling, water-cooler TV which will make viewers sweat with fear and rush with excitement.