Number of seasons: 6 Number of seasons it should have had: 3, if youre generous Its almost difficult to remember the absolute hysteria which surrounded Glees first season back in 2009. It was an immediate hit and praised for its irreverent humour, diverse cast and refreshingly cynical take on high school drama. The second season was more inconsistent, and by season three the quality of any given episode was completely unpredictable, although its finale did give us an emotional farewell to several original members of the New Directions. Season six will be Glees last, in part due to the passing of main cast member Cory Monteith in July 2013. The series has also become a shell of what it once was, drifting between its old stalwarts in New York and its derivative younger characters in McKinley High without the sense of excitement which accompanied its first season. Glee would not have been missed had it ended with graduation, and even then it wasnt the same show which captured the zeitgeist so perfectly in that first year.