Episode #3.8: Directed by Mike Griffiths, Lindsay Keith, Peter Eyre. With Richard Hammond, Jon Tickle, Tom Pringle, Charlotte Hudson. In this the final episode of the series, Brainiac boffin Jon Tickle checks out the science of urine. Richard Hammond goes to the dogs; we find out if you can you play darts whilst being electrocuted; and yet more ways to win at the funfair. Finally, ‘Caravan Golf’ reaches a gripping climax.