This season focuses on Sam and Diane's relationship. The attraction that they have for one another is clear, but their compatibility is tested throughout the season, especially in "Sumner's Return" and it doesn't help when Sam's friend intervenes "Old Flames". Meanwhile, Cliff's vast array of knowledge gets him into trouble, "Cliff's Rocky Moment". While on maternity leave in "Little Sister Don't Cha" Carla's younger sister fills in for Carla only to return as her 'say it like it is' self. Meanwhile, Coach finds himself getting stuck into unexpected and awkward situations when trying to do right "Coach Buries a Grudge".