1. Wind: The Invisible Force

Richard Hammond investigates how wind actually starts. He visits one of the windiest places on the planet, walks into the centre of a man-made tornado and creates a 10-metre high whirlwind - made of fire!

2. Water: The Shape Shifter

Richard Hammond investigates the role water plays in the weather. He tries to weigh a cloud, finds out how rain could crush a car and starts an avalanche.