Supernatural (TV series)/Recap/S06/E05 Live Free or Twi-Hard

Season 6, Episode 5:

Live Free Or Twi-Hard
During a fight with vampires, Dean is bitten and transformed. To obtain a cure, Samuel tells Dean to get the blood of the vampire that bit him. However, the vampire is the alpha of a pack that Dean must infiltrate.

Tropes
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 * Bland-Name Product: Several Twilight-inspired posters are seen in the show but none actually infringe on Stephanie Meyer's copyright. The closest it gets is a horrified Dean comparing himself to "Pattinson".
 * Expy: The vampire Robert and the human girl Kristen are obvious Expies of Edward and Bella, and their actors, Robert and Kristen.
 * Hypocritical Humor -- Dean complains about the 'rapey' behavior in the vampire book series the victim was a fan of, but that's exactly the behavior he does once he gets vampirized himself
 * Not Himself -- Sam
 * Parody -- the teaser mocks the Twilight series
 * Your Vampires Suck -- The whole point of the episode. "This is a national best-seller. How is that possible?"