I am a huge fan of this show. one Wednesday about 5/6 weeks into it's airing on Sky living i was flicking through and found this show and was hooked straight away. 9pm it was on average a week behind what went out in America. It was Fast paced action and had funny moments as well it is in truth alot like Third Watch or for the older Uk people London's Burning (when it was at it's best) with a excellent cast great storylines and even a spin off after one series (Chicago PD). I would recommend this to anyone into Emergency shows like Third Watch, Southland, Blue Bloods or for UK fans The Bill, London's Burning (or the rather poor rip off of London's Burning) Steel river blues.
Some of the cast will be known to people like Lt. Casey used to be in Neighbours and Chief Boden Was in the 88/89 episode's of The Bill.