Mature, talky teens ponder life's complexities.
Parents need to know that this series is all about teens who have a mature/adult vocabulary and general worldview (and quite the knack for pop culture references). As it follows them through high school and into college, the show deals with "typical" teen issues like sex, first loves, drinking, sexual orientation, depression, cheating in school, and parents' divorce. Of those, sex is probably one of the biggest themes; it's a frequent topic of discussion -- as well as action. Teens will likely find the characters' vocabulary, critical analysis, and maturity either inspiring or alienating.