Motorcycle racer and lorry mechanic Guy Martin loves pushing the boundaries of speed in search of a buzz. He claims that nothing can match the adrenaline rush he gets when racing on public roads around the isle of man TT course at 200mph. So now he's setting out to see if he can find anything that can give him the same kicks. Follow Guy as he attempts 13 of his fastest and most dangerous speed challenges, whether it's slip-streaming a racing driver to ride a bicycle at 100mph using pedal power alone, seeing if he can ride a motorbike across a lake, attempting to be the first man to ride 400mph on a motorcycle, attempting to beat the speed record for a human-powered boat and cross the English Channel in a human-powered airship, or driving his battered Transit van in the fasted road race on the planet: the Nevada Open Road Challenge. Along the way he'll get help from celebrities well known in the world of speed and goes head to head with racing legend David Coufthard, pitting bike against car in a test of speed the like of which Silverstone has never seen before.