Complex sentence: The premiere episode was watched by 6.77 million overall households, but declined almost every week in the Nielsen Ratings, ending with a season-low 4.25 million-household viewership during its finale episode, "Rock Show".
Split into simpler sentences: The premiere episode was watched by 6.77 million households but declined almost every week in the Nielsen Ratings. The show ended with a season-low viewership of 4.25 million households during its finale episode, "Rock Show".