I started watching this series at the beginning of the airing of series six. By the end of it, i had seen all the other episodes of all the other series. It is one of the best shows I have ever seen. It is addictive and you do get a genuine feel for the story lines - you cannot watch one episode without forming loads of opinions. People claim its unrealistic, it is not - as assured by the producers, everything in the show is possible in a real prison. Agreed, it may not happen to the same people, as in the series but give the show a break - its a TV series! It has to be exciting and it really really is. It is moving and the story lines are real and in most cases relevant to thew outside world as well, in my opinion. It is serious and can be upsetting but it is also one of the best acted and best written shows I've ever seen! I cannot wait for the next series!