This undated publicity photo released by Showtime shows Michael C. Hall, front left, as Dexter Morgan and Lauren Velez as Maria LaGuerta in a scene from "Dexter," Season 7, episode 12. The end is coming for "Dexter," Showtime's serial killer drama. The cable channel said Thursday, April 18, 2013, that the series' upcoming eighth season will be its last. (AP Photo/Showtime, Randy Tepper)
(CBS NEWS) Summer is about to get a lot bloodier.
"Dexter" returns Sunday for its eighth and final season, when Dexter's (Michael C. Hall) relationship with sister Debra (Jennifer Carpenter) is more fraught than ever before. (Warning: Some spoilers ahead.)
Last season ended with a shocker -- Deb shooting her boss, Captain LaGuerta, dead after she'd uncovered Dexter's secret serial killer life.
The new season picks up six months later, and Deb is not taking her transformation from cop to killer well.
"Deb and Dexter are estranged from one another at the beginning of the season," Hall revealed in a Showtime Q&A. "Deb won't talk to Dexter. She's avoiding him. So Dexter tells himself that things are good, his problems have been solved. On some level they have, but on another level, a lot of unresolved issues still come into play. And the subterranean stuff is starting to bubble up as the eighth season begins."
A trailer for the new season (watch it below) shows just how far Deb has spiraled since killing LaGuerta.
"You made me compromise everything about myself that I care about," she tells him. "And I hate you for it. I shot the wrong person in that trailer."
"Deb is really struggling," Hall said. "She's working as a private investigator and has left the police department. She is using the new job to plot, going deep undercover. Deb's hanging out with a pretty shady character, doing drugs to convince him of her authenticity and to self medicate. She is in the midst of an ongoing post traumatic stress episode. And it's a real mess."
This season will also introduce a new character who holds a key to Dexter's state of mind. We'll meet Dr. Evelyn Vogel (Charlotte Rampling), a neuropsychiatrist who helped Dexter's father fashion the "code" he lives by.
And it wouldn't be a season of "Dexter" without a big case for Miami Metro and our favorite serial killer to solve. This year's baddie is dubbed "The Brain Surgeon," so nicknamed because victims are found with pieces of their brains missing.
And none of that even touches on the other characters in play -- like Angel, Quinn, Dexter's now-escaped-from-prison scorned lover Hannah and his young son, Harrison.
Viewers have been speculating about Dexter's ultimate fate since the show began. Will he get caught? Will he die? And now that the show itself is meeting its maker, we'll all soon find out if Dexter's meeting his.