Complete Series Review + Spoilers
Season 1: Excellent
Season 2: Excellent
Season 3: What a joke about Lucas (anyone who watched the previous seasons knew it couldn't be him). Too bad it wasn't that dark filmed (lighting) as before. I did like getting to know the UnSubs and their lives, although it took away trying to figure out yourself who could have done it (profile for yourself). The biggest shame was when they revealed Jack as being that Sheriff mid-season. They should have revealed him as they did at the cabin with a flashback of Lucas looking scared at someone but this time showing the face of Jack/Sheriff in the courtroom.
Season 4: Dumb ending of the Samantha-Jack Storyline. The dumbest thing though was letting Samantha Waters' character go. She had more emotion that Rachel Burke. Lousy storylines involving John's Girlfriend dying, George's addiction & the next pregnancy of Grace after the miracle of her getting pregnant the first time.
Overall: It would have been better if they cancelled the show after season 2 and making a movie to conclude a 'good' ending for the Samantha-Jack storyline. Because the first two seasons were the best I had ever seen!