The final episode of Genius goes out tonight. 10pm. BBC2. The title for this entry was your clue.
Here's a preview clip:
As you can see, Stewart Lee is the guest. I think Stewart might well be the finest live stand-up in the country. If you've seen his recent BBC2 series you'll know just how smart and clever he is. It was certainly a real pleasure to work with him.
He was a guest on the first series of the radio show too. Because the show was brand new back then people were sometimes suspicious of the format, perhaps thinking it was a combative show (in which case, bringing in members of the public to spar with a professional comic would be ridiculous) but Stewart saw that they were the heroes of the piece straight away.
"This is bound to go to TV soon," said Stew, "can I come back and do it again if it does?"
"If it does, we'd love to have you," said I.
And four years later we did just that. It's nice when the world works. Fab.