This is a series based on New York firefighters coming to terms with life following 9/11. Although you might expect the usual 'God bless America' stuff you normally get with US dramas, this one is completely different. There is a great mix of hilarity and tragedy. The humour is very often sexist, racist, homophobic, anti-religious... basically if there's something people just aren't meant to say, one of the characters will!
They're due to release series 6 in the US in 2010...what a pity they STILL haven't realeased series 4 (2007) in UK format!!