The series, starring Michael C. Hall, airs on Showtime. Its final season is to premiere June 30.
E! quoted Moonves as saying the producers and writers of "Dexter" have a "clear endgame in place; I just can't talk about it just yet. The decision of when to end 'Dexter' is ultimately a creative decision and will be made on creative reasons."
2014: The Year in Music [PHOTOS]