A brand new podcast / NPR radio show was a couple weeks ago called Invisibilia. The first topic was called "Dark Thoughts" and it covers a man who watches a violent movie which triggers a severe case of Obsessive Compulsive Disorder. They talk about different therapy approaches and cover both Cognitive Behavioral Therapy (CBT) and Exposure Therapy. My wife is a social worker whose practice (http://www.jenniferrodgerslcsw.com) specializes in both of those therapies for children and adolescents so it was really interesting to hear how successful and popular these approaches are getting.
Here is a link. It starts out very dark but bear with it, its gets very interesting: http://www.npr.org/2015/01/09/375928124/dark-thoughts