Complex sentence: As a result of the show's success, the cast attempted to renegotiate their contracts in the summer of 2012 to obtain higher per-episode fees, but talks broke down to the point that the fourth season's first table read had to be postponed.
Split into simpler sentences: As a result of the show's success, the cast attempted to renegotiate their contracts in the summer of 2012 to obtain higher per-episode fees. However, talks broke down to the point where the first table read for the fourth season had to be postponed.