Despite being from the UK, never touched Hustle, Fawlty Towers is one of the best of all time, its a true classic and only ran for a mere 12 episodes I think it was.
As for Dexter I love the 3rd season as well I thought Miguel Prado was a great character. What has slightly bothered me is Dexter has become to humanized. 1st Season he was dark, that was him, you knew it, he knew it and he wasn't going to change, but it seems family life is tweaking him, which may be good to some how they are evolving the character, but I question it because the guy who he was in Season 1, he could not change, he could not "feel".