Complex sentence: The show has broken several ratings records on both A&E and cable television as a whole; the fourth season premiere drew 11.8 million viewers, the most-watched nonfiction cable telecast in history.
Split into simpler sentences: The show has broken several ratings records on both A&E and cable television as a whole. The fourth season premiere drew 11.8 million viewers; the most-watched nonfiction cable telecast in history.