Common Sense Note
Parents need to know that The Mortal Instruments: City of Bones is based on Cassandra Clare's best-selling urban fantasy series about warriors, demons, vampires, and werewolves and is the first film in a proposed action-fantasy franchise. Expect a lot of violent confrontations in the movie -- mostly using special blades and swords -- including scenes of torture and even death. Language is mild ("damn," "what the hell," etc.), and romance is limited to longing looks, a big kiss, and some sexy outfits. Like the book it's based on, the movie features a diverse cast and a brave female protagonist.
Sexual
Content
Clary and Jace gaze at each other longingly and eventually share a long kiss. Magnus Bane wears a revealing outfit (blazer, no shirt, boxer briefs) and flirts with Alec. A family secret alludes to the possibility of a forbidden relationship.
Violence
Lots of Shadowhunter-on-demon violence, and a couple of the demons are particularly frightening and gross. The Shadowhunters use blades and swords of all sizes (kindjals, chakrams, regular hand knives), as well as spears, vampire guns, and more. A swarm of vampires tries to kill or bite Clary and her friends and manages to land a bite on one unsuspecting character. Werewolves bite and kill demons; the villain and his thugs torture people, and several people come to blows. The body count includes several "extras." A major character is nearly killed, while others are seriously injured.
Language
Language includes "damn," "what the hell," "shut up," "crazy," and use of the word "mundane" as if it's pejorative, as well as "oh my God" and "Jesus" (as an exclamation).
Social
Behavior
Like the book, the movie stresses the bravery of teens, the importance of adolescent friendships, and the difficulty (but necessity) of being open about your true self. It also explores how family is more than a connection by blood.
Consumerism
A major character drives a Dodge Ram, an iPhone rings in several key scenes, there's a fight in front of a Rue 21, and Clary uses an Apple MacBook.
Drugs / Tobacco /
Alcohol
There's drinking at a warlock's party, where vampires spike the drink of a human partygoer with a sort of debilitating liquid.