Looks like show time have renewed Dexter for 2 more seasons.
From Digital Spy
Showtime has ordered two more seasons of its serial killer drama Dexter.
Based on Jeff Lindsay's novel Darkly Dreaming Dexter, the show revolves around a killer (Michael C. Hall) who works as a forensic blood spatter expert for the Miami Metro Police Department.
Season three premiered in the US last month, drawing in more than 3 million viewers.
The fourth and fifth seasons will comprise 12 episodes each, with production on season four slated to begin in spring 2009.
Showtime entertainment president Robert Greenblatt said of the two-season order: "Dexter's enormous success is a tribute to the great achievements of its cast, the producing team, the author of the original book, and the gifted Michael C. Hall.
"I thought at best we would attract a devoted cult audience but soon realised that, ironically, this show is so thematically rich and layered with humanity that audiences of all kinds have flocked to it."
Great news. I just hope they can keep up the quality, because it's up there with my favourite TV shows ever.