The Top Gear host presents the last of this series which tackles all things weather related. That may sound boring, but Hammond has his usual way of making things interesting. Tonight he investigates the importance of heat - or the lack of it - when it comes to weather. As science buffs out there already know, without temperature, clouds, rain, snow, dust storms, thunder or lightning would be unable to form. Hammond manages to build his own massive dust storm along the way and also drops in on a scientist who creates lightning bolts in his laboratory. Awesome.