Complex sentence: The second season premiere, "Ello Gov'nor", marked a decline from the first season premiere (it gained 2.067 million views), but it marked an increase from the first season finale, which was watched by only 2.028 million viewers.
Split into simpler sentences: The second season premiere, "Ello Gov'nor", marked a decline from the first season premiere's figures. It gained 2.067 million views, but it marked an increase from the first season finale, which was watched by 2.028 million viewers.