The Most Meta shows on TV—> Supernatural
From having their characters read slash fanfiction about themselves to killing their creator with a shotgun, Supernatural has gotten progressively more meta as the seasons advance. Using the universe bending power of angels and other monsters, the show has been able to get away with literally creating an entire franchise about their own characters within the confines of their own show. Several themed meta episodes, as well as constant pop culture references creatively curb the drama in an otherwise serious show. The meta genius of Supernatural ranges from fun to incredibly bizarre.
Notable meta episodes: The French Mistake, The Monster at the End of the Book, The Real Ghostbusters.