Showtime has unveiled the first teaser trailer for the upcoming eighth season of the drama series Dexter, and things don't appear to be very calm in the Dexter universe.  The teaser doesn’t show any actual footage from the season (as is the case with most TV teasers), but we do get a rather ominous voiceover from Michael C. Hall’s title character warning viewers that he’s starting to lose control of his so-called Dark Passenger.  There’s been no official announcement that this is the final season of the popular serial killer show yet, but going into season seven the producers were operating under the assumption that they were starting an end-of-series arc that would conclude at the close of season eight.  Dexter has definitely had its ups and downs over the years, but it should be interesting to see what kind of endgame is set up in the season eight premiere.

Hit the jump to watch the teaser trailer.  Dexter returns on Sunday, June 30th on Showtime.

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