Showtime has picked up a fourth and fifth season of Dexter, at 12 episodes each.
Production on season four is set to begin in L.A. in the US spring.
The third series premiere drew 1.2m viewers in the US last month, no doubt boosted by its (edited) screening on CBS during the writers strike. It also nabbed some Emmy nominations, including for Michael C. Hall as Most Outstanding Actor.
In Australia the third series will air on Showcase in January. TEN is likely to screen a second season in 2009, but no confirmation just yet…