Common Sense Note
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.
Sex is an ongoing, central issue throughout the series, and in its original run, the show had a bit of a racy reputation. Jen has a promiscuous past, and sex is taken seriously by all of the characters. Some episodes deal with teens losing their virginity. Both heterosexual and homosexual relationships are dealt with.
The rare fist-fght or car crash is used to teach an overall lesson.
Relatively mild on the swearing front: "damn," "hell," "bitch," "ass," etc. More significant is the constant dialogue among the characters to work out issues or express feelings in a mature, articulate manner.
The characters' talky nature promotes communication about the complications of adolescence. The teens' families also play important roles in helping them solve their problems, when needed.
Drugs / Tobacco /
Occasional teen drinking, but consequences and/or discipline is usually the result.