First thing to mention is that series 5 and the final series 6 are only available on region 1 so you need that or a multi regional player. I bought a multi regional player just so I could own this fantastic series. 22 episodes of pure brilliance.
This series never gets mentioned in the same breath as The Sopranos, The Wire etc but in my opinion it should!! Have watched since day 1 and it just keeps getting better. Its outrageous viewing at times, says it as it is and would make some cringe but its one of the best series ever to come out of the USA.
In short it follows Tommy Gavin (Dennis Leary) and the fire crew of house 62 of the FDNY. Tommy is an alcoholic who continually battles with his demons, his messy personal life and the ghosts who haunt him. The rest of the crew have equally disfunctional lives which are compulsive viewing!! Lou, Garritty, Franco, Mike and the rest are fab and the storylines are great. Do yourself a favour and watch this from start to finish you will not regret it!! So disappointing series 6 was the last ever made!! Full of laughs as well as tragedy!! Just excellent viewing.