Most of the databases include both popular and scholarly articles, but have a box that you can check to limit your search to just scholarly articles--simply check the box that says Peer Reviewed or Scholarly Article.
You can find critiques of communication theories in textbooks, reference books, and in journal articles.
Newspapers and popular magazines can be found in the library, 2nd floor south.
Popular movies on DVD can be found in the library - 3rd floor south
Popular TV shows on DVD can be found in the library - 3rd floor south