This is a good tv show. I like the plot and concept of this show. All the episodes of this show are superb.

^I thought all episodes of season 1 and season 2 were good.

Season 3, I felt the show quality started to deteriorate, but it was still watchable.

Season 4, I hated. They killed off my favorite character and then the show got worse and worse. Then it understandably got cancelled.