Carrie conducts a secret investigation when Homeland Security takes over a bombing case from Major Crimes and concludes that it is tied to terrorism. Meanwhile, Joanne makes friends with Cherie's daughter Maya.
When LaGuerta arrests Dexter he shows its far from over and he plans to finish what he started with Hector Estrada. With LaGuerta close to proving that Dexter is the Bay Harbor Butcher in front of everyone, Dexter is left no choice but to deal with LaGuerta and close the Bay Harbor Butcher case once and for all.moreless
LaGuerta now believes that Dexter is the Bay Harbor Butcher and sends Matthews to talk to him. Dexter also must find a way to kill the last of his mother's killers when Hector Estrada is released. Dexter also questions Hannah about when Debra mysteriously just blacks out leading to a car accident. Quinn learns that Nadia has skipped town.moreless
When the Phantom arsonist kills again, Dexter moves closer to finding his identity. Dexter explains his dark passenger to Hannah while she is visited by her father who hasn't always been the best father to her. Quinn has a final confrontation with George Novikov who decided to send Nadia to another club. LaGuerta tells Matthews that she thinks Dexter is the Bay Harbor Butcher and they both try to resolve a way to deal with the situation.moreless
Dexter is surprised to find that Issak comes to him for help when his life is in danger but because Issak has had Hannah kidnapped Dexter has to cooperate. La Guerta shares her theory to Mathews about the Bay Harbor Butcher and Debra is embarrassed about telling Dexter that she's in love with him.moreless
Dexter is conflicted with the phone call that Deb made to him. He has to make a decision between Hannah and his sister. It goes beyond that though, will he honor his own code? Another problem arises when Aster and Cody's grandfather has a kidney stone and the kids end up with Dexter. This can be very dangerous when he has a target on his head from Issac. Dexter also saves Issac's life by accident. We also find out why Issac so desperately want Dexter's dead, Issac is holding on to a secret.moreless
Sal Price learns about Dexter and Hannah's relationship and helps Debra to dig up more information on Hannah. Quinn goes on extreme to protect his girlfriend.
A local crime writer Sal Price attracted to Debra and she used this to get info on Hannah McKay. But Dexter is already planning to kill Hannah. Quin gets an strange offer and Batista wants to retire and open a restaurant. Meanwhile, LaGuerta is near getting new evidence in the Bay Harbor Butcher case.moreless
Deb discovers that LaGuerta sent some forensic evidence to an outside lab. LaGuerta confides in Deb that she found Dex's blood slide and is convinced that the Bay Harbor Butcher is still active and Doakes was innocent. Deb offers to help LaGuerta, so that she can steer theinvestigationaway from Dexter ifnecessary. Dexter discovers blood on his boat and finds out that Isaak is after him. Hannah McKay is back to help find some of the victims from the killing spree. Dexter finds something interesting while studying one of the unearthed bodies.moreless
Deb and the police catch Ray Speltzer. They work him and get a confession. After a video of Ray's arrest reveals that the officers did not properly Mirandize him, they are forced to let him go. Dexter realizes that this is his chance to take Ray out in his own special way. Dexter realizes that some things have to change if he can continue to keep himself separate from guys like Ray. The strip club is still being raided and Isaak has had enough. He decides to give the police what they want, even if it means framing an innocent man.moreless
Debra tries to reconcile with her brother while trying to cover up the murder she witnessed in the Season 6 finale.
In the season finale, religious zealot Travis (Colin Hanks) continues his plan to bring about the end of the world, leading him to kidnapping Dexter's (Michael C. Hall) son, resulting in a climatic and bloody battle between the two of them on a boat.moreless
Danger arrives to Miami Metro. Dexter continues to try and lure Travis in while Deb continues to see her therapist.
The mirror-match continues. Travis enlists some new acolytes. Miami Metro gets two new breaks. Dexter finds himself in hot water, confused about what to do with Wormwood.
Dexter tries to stay one step ahead of the Homicide Division concerning the Doomsday Killers, while he finds help from an unlikely source; Debra uncovers something unexpected about herself during her therapy sessions.moreless
Dexter, using what he's learned from Brother Sam, comes a step closer to the Doomsday killers, specifically Travis; Deb and LaGuerta go head-to-head after a call girl ends up dead.
Miami Metro gets closer to Gellar and Travis thanks to the new intern. Meanwhile Dexter deals with faces from the past. Travis tries to move on from Gellar.
Dexter investigates who shot Brother Sam. Meanwhile, Homicide interrogates the woman who Quinn slept with who is involved in the Doomsday Killer case.
With the help of his newfound friend Brother Sam, Dexter wonders if there is light within him to counter the darkness, while the search for the Doomsday Killers takes him in a new direction; Batista and Quinn pay a visit to the university where Professor Gellar taught; due to departmental regulations following the shooting, Debra is forced to begin therapy.moreless
The team investigates murders that have a religious undertone to them.
Dexter faces a serial killer from his past; Debra has problems with her new position and Travis with Gellar think of their next move.
In order to solve the mysterious murders, Homicide asks for the help of Brother Sam, who Dexter knows used to be a serial killer. Debra has two proposals, one personal and one job-related.moreless
Dexter uses his 20 year high school reunion as a chance to hunt the prom king. It's going fine until he is called to the scene of a vicious faith-based murder leaving him with questions about what he wants to pass on to Harrison. Debra who is finally in a good place with her relationship with Quinn and her job becomes an unexpected hero.
During her son's funeral, Carmen Vega a vicious drugs queen-pin makes a violent and lethal escape. Her plan is to get the cartel back in order and eventually enthrone her surviving son, Cesar. She will stop at nothing to do this even killing members of her own family and gang. The Breakout Kings smell a rat however when they always seem to be one step behind their prey and things go from bad to worse when they realise that they must capture Carmen, not only to ensure their month off their sentence but also because she is responsible for the kidnap of Shea's girlfriend.moreless