Dexter is so close to finishing Trinity and ending his marriage to Rita. Dexter has begun to realize that the closer he gets to Trinity, the more he stands to learn from this very different beast. And when the friction between Rita and him comes to a head, Dexter gleans relationship advice from a most unlikely source.

Dexter knows it’s only a matter of time before Miami Metro discovers the Trinity Killer’s latest handiwork. Therefore, he has to work doubly hard to stay one step ahead of their investigation. Trinity hides behind a well-kept mask, and getting behind that facade will require some extra prodding on Dexter’s part.

Meanwhile, Debra becomes frustrated when she finds herself shut out from her own case. She considers bending the rules in the name of justice, risking her career in the process. LaGuerta and Batista come to regret a major decision, and realize that by playing by the rules they may have painted themselves into a corner.

In addition to the preview, Showtime releases two clips from the November 1 episode. The first one deals with Debra telling Dexter her theory while the second one is about Rita and Dexter going for marriage counseling.

Keith Carradine returned this season on Dexter, bringing special agent Frank Lundy back into the life of Dexter, Deb and Miami’s newest serial killer.

But the character didn’t stick around too long, as he appeared to be bite the literal bullet last night when he and Deb were gunned down in a parking lot.

It looks like Dexter’s sister will make it, but the odds aren’t good for Carradine’s Lundy.

“It didn’t come as a complete shock,” the actor told TV Guide Magazine when asked about his character’s fate. “The scenario was laid out pretty clear to me when they asked me to come back.”

Did Trinity take out Lundy? Or is there any chance Anton’s jealousy led to a heinous act?

Don’t feel badly for Carradine, however.

He’ll guest star on both Dollhouse and Damages in the near future.

Dexter finally believes he understands the beast known as Trinity. But when a ten-year old boy goes missing, Dexter is forced to question everything he’s learned up to this point. It’s a race against the clock. And with each step forward, Dexter has to confront the real possibility that he may have more in common with Trinity than he’d like to admit. Secrets abound – from Cody, who is forced to defend one of Dexter’s lies, Masuka, who can’t bring himself to confess what he witnessed at Thanksgiving, and Debra, whose recent discoveries force one of Miami’s finest into making an impossible decision.

For most people, Thanksgiving is a time for traditions and family. But for Dexter, it’s an opportunity to get closer to his most dangerous adversary yet. As Dexter gains insight into Arthur’s psychology by studying those closest to him, he finds himself drawn into a bizarre and twisted world. Meanwhile, Rita has her hands full preparing dinner for a packed house, including a few unexpected guests. Batista gets closure on an old case, while Debra uses the holiday to continue her investigation of the Trinity Killer, a pursuit which threatens her brother’s safety and brings to light surprising revelations about someone else close to her.

Dexter has always known his father’s Code was meant to protect him from exposure. But after committing a serious mistake, he wonders if it could have been designed to protect him from something even more dangerous – human emotion. When he discovers that Trinity is planning an out-of-town trip, Dexter sees an opportunity to ride along and gain insight into the mind of a fellow monster. Even so, Dexter isn’t prepared for the startling revelations Trinity makes along the way, revelations about his own past which only serve to convince Dexter of what he must do. Meanwhile, back at Miami Metro, Debra refuses to let a technicality keep her off the Trinity case. She works through others to ensure her voice is heard – that is, until she realizes that her single-minded pursuit of the Trinity Killer may have blinded her to the truth.

Dexter finds himself enjoying a brief moment of tranquility. He’s finally managed to strike a balance between work, family… and other pursuits. But he’s keenly aware that times like these aren’t meant to last. When Miami Metro discovers a string of murders connected to a prominent photographer, Dexter sees an opportunity for a clean kill. However, his plans seem to be thwarted every step of the way. Quinn has taken a renewed interest in Dexter’s nightlife. Dexter’s plans to keep Astor and Cody distracted with new activities soon backfire. Even Harry disapproves of Dexter’s choice of pastime, urging him instead to focus his efforts on the Trinity Killer. Meanwhile, Debra returns to work, frustrated to find everyone treating her with kid gloves. She decides to concentrate on her pursuit of the Trinity Killer as well as delving into her father’s checkered past – investigations which Dexter fears might lead her to danger – or worse, the truth.

Dexter knows it’s only a matter of time before Miami Metro discovers the Trinity Killer’s latest handiwork. Therefore, he has to work doubly hard to stay one step ahead of their investigation. Dexter has begun to realize that the closer he gets to Trinity, the more he stands to learn from this very different beast. Trinity hides behind a well-kept mask, and getting behind that facade will require some extra prodding on Dexter’s part. Meanwhile, Debra becomes frustrated when she finds herself shut out from her own case. She considers bending the rules in the name of justice, risking her career in the process. LaGuerta and Batista come to regret a major decision, and realize that by playing by the rules they may have painted themselves into a corner. And when the friction between Rita and Dexter comes to a head, Dexter gleans relationship advice from a most unlikely source.

Recent events spur Dexter into his own investigation of the Trinity killer. His motivations are now personal, and the clock is ticking. But the closer Dexter gets, the more he realizes that Trinity is unlike any monster he’s previously encountered. Meanwhile, Debra blames herself for events that were out of her control, and in so doing pushes away those closest to her. As LaGuerta and Batista close in on the Vacation Murderers, Batista realizes he can use Quinn’s relationship with a certain reporter to his advantage. And when Rita discovers a secret Dexter’s been keeping from her, she begins to realize just how little she knows about the man she married.

Rita takes the kids out of town for the weekend, leaving Dexter time for some much needed R&R. And for him, that means stalking a new victim. He sets his sights on a woman accused of murdering her family - a fellow cop, no less. The more Dexter learns about this woman, the more he begins to question his own judgment. Can Dexter handle the pressures of family, or is he headed down a similar dark path? Meanwhile, LaGuerta and Batista argue over department protocol, which threatens their professional relationship. And Debra aids Lundy in his quest to find the Trinity Killer, neither of them realizing just how close Trinity is to achieving his goals.

Written By: Melissa Rosenberg & Wendy West
Directed By: John Dahl