Instruct: Classify a given Amazon review as either positive or negative.
Query: Series 1-3 were Superb...Series 4 dreadful!

I enjoyed Series 1-3 immensely. The stories, acting, directing, and character building was first rate. After seeing Series 4 I am scratching my head wondering what happened and why was everything so different including the opening. It was a complete let down when Eleanor all of a sudden lost interest in Joe and pursued a man she barely even knew. This was not believable to say the least especially after the two had gotten so close in Series 3. I am so disappointed I don't even feel like bothering with Disc 2. I feel like giving that different production company a piece of mind but it's so after the fact by 12 years to be exact. If they ever read this, I would say this to them, "What were you thinking??!!"