Complex sentence: Despite its poor showing in the ratings, ABC was still very interested in renewing "Bewitched" for a ninth season, however Elizabeth Montgomery's marriage to William Asher was in trouble and the couple had separated by the end of the eighth season.
Split into simpler sentences: Despite its poor showing in the ratings, the show was still contracted for a ninth season. However, Elizabeth Montgomery's marriage to William Asher was in trouble and the couple had separated by the end of the eighth season.