Dexter ‘The Final Season Trailer’, the breaking of Deb Sean Thomas May 17, 2013 Culture, Television Although fans may be sad that this is the last season of Dexter, they should be excited that the new season is almost starting up. From the looks of the official Dexter trailer, things are still not going well with Deb. This will be the final season, season eighth of the hit Showtime series Dexter. Fans might have a hard time recognizing Deb in the trailer (played by Jennifer Carpenter). SPOILERS FROM PAST SHOWS. When Deb killed LaGuerta, it was safe to assume that nothing was going to turn out ok for Deb, at least it looked that way at the time. From the looks of the new trailer, we can assume that things haven’t been getting any better since we left her. Deb was busted for a DUI and she wanted to confesse to something, but we won’t know what that is for sometime now. Dexter will premier on June 30, 2013 at 9 p.m. on Showtime.