Showtime has released the fourth Season 7 trailer for Dexter, ahead of the highly-anticipated premiere Episode 7.01: Are You...?, airing Sunday, September 30 at 9 PM ET. Dexter (Michael C. Hall) is involved in quite a complicated scenario with his sister, Deb (Jennifer Carpenter), heading into this latest run of episodes. Watch as Dexter prepares to expose his 'Dark Passenger' to the one he loves the most!