David Simon's The Wire is the greatest TV show of all time. IMHO. Better than The Sopranos, better than Curb My Enthusiasm, better than anything, including Buffy and I loved Buffy. It's more like a novel spread over five seasons than it is a TV series and as Charlie Booker once wrote: "You either love The Wire, or you haven't seen it." It's that simple.
Season four is just out on DVD and season five, the last unfortunately, starts on HBO in the US in January. Simon has put together three short prequels which can be viewed via the season four DVD page on amazon.com. For fans, it's well worth checking out. For non fans, here's teaser of season five, with McNulty, back drinking, about to be a naughty boy. Again.