Common Sense Note
Parents need to know that this sci-fi/action series from the creator of Buffy the Vampire Slayer plays with the concept of identity. The Dollhouse's "actives" have no personality of their own; each is temporarily imprinted with another identity before a mission. Between jobs, they're left with no character at all, existing as childlike innocents. Those elements could appeal to teens, who are still in the process of figuring out who they are and what they want to be -- but it also means that the characters don't really gain enough traction to become role models. Expect some swearing ("bitch"), social drinking, and sex (nothing too sensitive is shown), and quite a lot of violence -- though relatively little blood.
Some sex scenes that feature partially-clothed characters and touch on topics like bondage, though no sensitive body parts are shown. Some references to sex, and barely/scantily clad male and female characters are sometimes shown showering or changing -- though again, no sensitive body parts are visible.
Plenty of action -- including martial arts fistfights and military-style assaults with machine guns and other weapons. Some characters are shot and killed, though there's not too much in the way of blood and gore.
Language includes fairly infrequent use of words like "bitch" and "crap."
The Dollhouse is a highly illegal underground operation. Echo is a strong, powerful female character -- albeit one who's not wholly empowered, since the actives are implanted with new personalities before each dangerous secret missions (the personalities are erased after each outing, leaving the actives as blank slates who spend their downtime in a childlike state of innocence). An FBI agent has vowed to find the Dollhouse and shut it down.
Drugs / Tobacco /
Some social drinking at bars and nightclubs.