This was on last night. I didn't watch it tho. It was that or South Park, the episode where the peruvian bands get sent to Gitmo and giant guinea pigs (and guinea bees, mice and a guinea pirate) starting destroying the world. And I'd already seen the first half.
"I’ve just completed Mike’s Nature trick of adding in the real temps to each series for the last 20 years (ie from 1981 onwards) amd from 1961 for Keith’s to hide the decline."