As a Comic-Con treat for "Dexter" fans, Showtime has released the first two minutes of "the serial killer thriller's highly-anticipated Season 7 premiere. The new season picks after Dexter's step-sister Deb discovered his dark secret in the Season 6 finale. The first two minutes of the premiere kick off right where Season 6 ended, revealing how Dexter tries to talk himself out of situation to Deb and what he'll do when she starts to call the station.Before this new footage, "Dexter" has been releasing a steady stream of promo videos hyping up its new season.