S1 to s4 are amazing, so funny and well written with well planned character arcs, season 5... camt say the same. So rushed, there was like no plot and the ending was dissapointing. Apart from season 5 which I'm trying to pretend never happened it's amazing, I love how the time periods mentioned were accurate to the point and its one of the best shows that has aired on iplayer (apart from series 5.)
4 stars, one for every good season