When does the fifth season of "Dexter" begin? Are you kidding? We're still trying to catch our breath after the shocking conclusion revealed in last night's finale of season four! Fans of Showtime's original series are dying to know when season five will premiere, but unfortunately, there is no set date. Considering the show usually airs its premiere for each season in September, that's when I'm guessing we can expect the fifth season to return. There have been no official announcements on the network's behalf, nor to we expect one until sometime next year. Nevertheless, as soon as we find out we'll certainly let all you readers and fans of the series know. In the meantime, if you haven't seen a single episode of "Dexter", you're truly missing out. Simply put, go rent this series!