I liked the most recent one of the current series of 8 Out of 10 Cats Does Countdown (series 27, episode 3, shown on Friday). I find this show can be rather hit and miss these days, as is usually the case when a format is repeated for years - but when on form it can still deliver some decent laughs.
Alasdair Beckett-King had some of the funniest moments IMO. I think he'd been on Mock the Week ages ago.. I guess he'll appear on WILTY and Taskmaster eventually, as they often tend to complete the set (Like the others in that episode: Guz Khan, Joe Wilkinson, Katherine Ryan and Jon Richardson).