Instruct: Classify Amazon reviews into positive or negative sentiment
Query: flat

I found this episode not very exciting, compared to all others up to this point. I am a big fan of the series, but this particular one was really flat.I think that when the show starting weaving between the two universes, it got pretty complex. But when they pulled characters out (Peter) and injected new ones (Lee), plus the characters had no memory of each other, it got too difficult to follow. This mess started toward the end of season 3 and continues in the first episodes of season 4. Hopefully it will get better.