The previews so far don't really reveal much of what will happen this season, but we do know a few things, the most disturbing of which is the fact that Paris Hilton will guest-star in a later episode as a demon who has taken the form of Paris Hilton -- which is ironic, since Paris Hilton is a demon in Paris Hilton form. A demon named Paris Hilton. I was unhappy about this casting news until I heard that Kristin Kreuk was going to be on Chuck as a regular; Suddenly, a one-off, self-mocking episode with Hilton sounds like a swell idea. Additionally, hunter Jo and her mother Ellen Harvelle will return, as will the hunter Rufus, the angel Castiel and Chuck the Prophet. (Castiel and Dean may even go out as partners while Sam mopes.) A flash of a gut-shot Bobby Singer pops up in the teaser, but I'm not even sure what's old and what's new anymore.

Supernatural airs tonight at 9 PM on the CW. For more options, check out our Week in Preview.