We knew this day was coming. Season eight of Dexter will, officially, be the last season. Les Moonves, the head of CBS (both networks are owned by the CBS Corporation) referred to the cabler's mainstay as its "last season" in a call with investors. Hollywood Reporter reached out to Showtime reps, who would not confirm this news, but Moonves said, during the call, that their new series Ray Donovan "comes on with Dexter's last season starting in June."
It has long been assumed that season eight would be the last season for Dexter. Last year, after a difficult contract negotiation with star Michael C. Hall, Showtime announced that they made a deal for seasons seven and eight of the series. Normally, when a network picks up a primetime show for multiple seasons, that is a good indicator that that is the end of the series. However, after some changes at the top of the food chain at Showtime, there seemed to be hesitation about ending the network's longest-running drama.
Either that, or they just like dicking with us.
Dexter begins its eighth and final season on June 30th.