Yesterday, Showtime debuted the fourth trailer for Season 7 of Dexter, featuring Michael C. Hall's title character discussing his "dark passenger." Today, the network has unleashed another trailer, that may seem like the very same video, until a new twist at the end with Dexter's sister, Deb (Jennifer Carpenter). How will she handle this revelation? Check out the video and then tune in to the Season 7 premiere, Episode 7.01: Are You...?, on Sunday, September 30 at 9 PM ET to find out what happens next.

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