8:30 p.m. and 9:30 p.m. | CBS — Life in Pieces Kristen Baldwin gave the season premiere a B+. The best family comedies are the ones that celebrate the truth: Most of the time, families are an ordeal. CBS’ underappreciated sitcom returns for a fourth season with two episodes: In the premiere, the Short clan heads to a subpar Mexican resort—think vampire bats and hole toilets—for Joan (Dianne Wiest) and John’s (James Brolin) 50th anniversary.