First couple of seasons started out strong, but the third season didn't pick up until the last few episodes - almost stopped watching it. Can't see how much further they can take the story. The fourth season almost seems like a token gesture to fans and in all honesty, 17 episodes into the fourth season, the storyline is starting to get, well, stupid. I think it is time they drew the line in the sand and ended it. before we have to sit through a fifth season - that may just make me stop watching.