Dazbo, series 4 certainly had good bits. But either the writers were lazy or no-one had the guts to reel in Rowan Atkinson, because every other exchange goes:-

"...isn't it, sir?"
"No, it's as ... as a .... that's really ...."

Individually, those lines are funny. After half an hour, they get a bit wearing. After a whole series of the same thing, you're about ready to put a foot through the TV.

Graham.