Ah its almost impossible to get into if you haven't been watching it from the beginning. If you can get season 1, watch it. You won't regret it. It's probably on play.com cheap as chips now, or you can buy the whole boxset. Seriously though, never seen anything on TV that comes anywhere close to being as good!
Ah Lost, got the first four seasons on DVD, rented season 5 but didn't quite get round to watching it, saw the first couple of episodes I think. Will prob end up buying it soon, might as well finish off the collection eh.