Matt Roush: For everyone's sake, I think Supernatural is better off staying put on the CW, which has already renewed the show for a fourth season, putting to rest (I'd like to hope) all of the paranoid why-does-the-CW-hate-this show whining, at least for now. Unlike an import like Showtime's Dexter, this one doesn't fit the CBS demographic at all, and it would risk looking like a bust on the big network, whereas on the CW it fills the cult niche just fine.

creditos : http://www.tvguide.com/ask-matt#top