Teen wolf is a new horror/drama show that has some strong scenes that get worse through the seasons.
The first season of teen wolf is pretty mild, there is a couple of scenes that include bodies with guts hanging out, some pretty bloodied bodies with some intense horror themes and bloody violence. It also contains some talk sex and other teenagey things but nothing much is shown.
In the second season there are some extreme horror scenes that include snakes popping out people's eyeballs, people being chopped in half with there guts falling out, people throwing up there intestines and spewing out all the blood inside there body. There is also suspense, bloodied dead bodies, torturing, gory violence, underage drinking, drugs, surgical scenes and gory violence.
In the third season there is a new threat that is going around killing people in the most brutal way possible characters are found impaled, strangled, bashed, burnt, drowned and eaten. There is also some intense horror, some pretty scary monsters , bloody violence, torture, sex, drugs, drinking, smoking, medical procedures, duisgusting diseases, language, phycopathic themes, characters go into madhouses which pretty much have phychos in them, suicide, self infliction and madness to the point of suicide or worse.
In the next season there is pretty much nothing worse than previous season (concepts shown above). One scene more intense than other seasons contains a mad character drilling a hole in his head and it shows the inside of his head which has a duisgusting eye in it.
Overall the series is very violent and extremely gory but most mature teens could watch it in my opinion, the average age would be around 15 to watch this series, anything younger would be too full on.