Karl isn't the sharpest tool in the shed, so watching him experience new strange lands is hilarious and sometimes shocking. He was the key, if not the most important part, of the Gervais podcast series. The man is either a comic genius or naturally void of any intelligence. Either way, he has his charming moments.
The whole point is to send Karl--who has a freakishly round head--around the world. On one hand, Merchant wants to send him to see if Karl's simplistic (sometimes comically ignorant) outlook on like will change. Gervais just wants to put him through hell for his amusement.
Its pretty hilarious. Sadly, it's only on Sky1 in the UK, as far as I know. So, I'm forced to watch the scraps online. Let's hope Canada gets the show at some point. Check it out for a laugh.