in graduate school, i took a class called "media theory and criticism." it was one of the most worthless classes i have taken since kindergarten. the professor was this gnarly old dude who would sweat and swig gatorade while jabbering on nervously and nonsensically for four hours straight, two nights a week. it was torture.
he taught us that there are three basic genres in television. here's a video about them:
that's not really what he taught us but everything in that class was either way too convoluted or way too oversimplified. and always always always in ways that weren't really applicable to real shows or movies.