Supernatural, “Bloodlines”
The TV concept “backdoor pilot” refers to an episode of an exisiting TV show that subtly sets up the world of a new TV show. For this trick to work, however, you need to actually make that new show. When you don’t, you get “Bloodlines”, a confusing and apathetic entry that follows a cop we’ve never met before and a shoehorned mythology that involves a monster mafia. CW passed, condemning this episode to be a strange footnote.