Supernatural has often had recourse to parody, and over the past several seasons they have really elevated self-referentiality to new, dizzying heights. But this kind of meta fourth wall breaking has been a growing trend in the show from very early on.
In Season 4’s “The Monster at the End of this Book” (HINT: it’s Grover!), Sam (Jared Padalecki) and Dean (Jensen Ackles) walk into a comic book store, asking their usual creepy questions, and are mistaken for fans recreating the lives of the fictional Sam and Dean from the cult book series, Supernatural. Tracking down author Carter Edlund, AKA Chuck (Rob Benedict), who has been receiving visions of their wacky lives and writing them down for fun and profit, they are soon told that the guy’s not a psychic, as they had supposed, but a prophet of the Lord.
In Season 5, things get even funnier, when Sam and Dean find themselves ghost hunting at a Them Convention. In the course of this story-line, fans, fan-fiction, slash fiction, some of the lesser episodes of the show itself, role playing games, fan conventions and nitpickers are all grist for the comedy mill. In Season 5’s first episode, even Galaxy Quest gets an homage, when Supernatural über-fan, Becky (Emily Perkins), channels her inner-Justin Long.
BECKY: I know that Supernatural is just a book, okay? I know the difference between fantasy and reality.
CHUCK: Becky, it’s all real.
BECKY: I knew it!
— “Sympathy for the Devil” (S05E01)
BRANDON: I understand completely it’s just a TV show…
JASON: It’s all real.
BRANDON: Oh, my God, I knew it. I knew it, I knew it!
— Galaxy Quest (1999)
Season 10 made yet another foray into Supernatural fan fiction — in the 200th episode, aptly entitled “Fan Fiction” — when the boys happen upon an all-girl high school musical written by the imaginative Marie (Katie Sarife), based on the Supernatural books. Dean is not pleased.
DEAN: What are they doing?
MARIE: Oh, uh… they’re rehearsing the BM scene.
DEAN: The bowel movement scene?
MARIE: No! The boy melodrama scene. You know, the scene where the boys get together, and they’re, they’re driving or leaning against Baby… drinking a beer… sharing their feelings… The two of them. Alone. But together. Bonded. United. The power of their…
DEAN: Why are they standing so close together?
MARIE: Uh… reasons.
DEAN: You know they’re brothers, right?
MARIE: Well, duh. But… subtext.
DEAN: Why don’t you take a sub step back there, ladies?
They also “explore the nature of Destiel in Act II,” and ponder the fate of poor forgotten Adam, the Other Winchester. It’s pure fan service, and very amusing indeed.