Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Best season yet!

I own seasons 1-4 on DVD now. This 4th season is by far the best. The new characters are great, the story lines are fresh and complex and the season ending double episode is my personal favorite. The only downside is the shortened season due to the writers strike which left season 4 with only 16 episodes. Other than that I would have rated it 5 stars.