Jack Osbourne takes a gang of famous friends on a mission to find the toughest adrenaline challenges in the world. In Africa he is joined by ex-Hollyoaks babe Gemma Atkinson, Harry potter star Tom Felton and Coronation Street's Wendi Peters; where they bunjee jump from a terrifyingly high bridge, go nose-to-nose with great white sharks and freefall parachute from a helicopter.