"The Vampire Diaries" debuted a few years after "Supernatural,” and the show similarly features co-dependent brothers who fall on a sword (or fang) for each other. The Salvatores tend to be the hunted instead of the hunters, and in a perpetual love triangle with a Mystic Falls local, Elena Gilbert.
This Superman prequel made "Supernatural" possible with its monster-of-the-week setup. There’s also a familiar face in Season 4 of the series, as Jensen Ackles headed to Smallville playing coach Jason Teague just one year before he was Dean on "Supernatural."