Showtime has unleashed the sixth trailer for Dexter, returning for Season 7 with the premiere episode "Are You...?" Friday, September 30 at 9 PM ET. The world of Michael C. Hall's Dexter is starting to come unraveled, with his sister Deb (Jennifer Carpenter) starting to realize who he really is.

CLICK HERE to visit TVWeb and take a look at this video with scenes from past episodes of this hit series that lead into the new season.