Castle goes undercover as a professor after a college fraternity student is killed in a grisly manner. During the investigation, he and Beckett unearth some sinister secrets the university wants to keep suppressed.moreless
The first season ends with a looming global crisis, which Walter attempts to avert with other heads of state via videoconferencing. Meanwhile, Zeke and Glenn are in a compromised state; and Alex tries to establish a personal connection with Zaman.moreless
Walter seeks to make a deal with Zaman's highest-ranking general; a grounded Zeke and Glenn find a way to pass the time; Rafiq's translation helps Alex determine how to go about implementing Walter's "Plan B."moreless
Alex makes amends; Zeke is forced to face the women in his life; Walter urges caution in the Situation Room.
Alex plans an escape for some Pakistani schoolgirls; Zeke is challenged to a fight; Walter fakes a medical emergency.
Walter runs into Joanne in Tel Aviv and tries to use her new position to his advantage. Meanwhile, Zeke and Glenn, who are being held hostage by Martin and Vanessa, agree to participate in role-playing games in hopes of being released; and Kittredge shares a revolutionary dream with Alex.moreless
Zeke and Glenn are rescued by an eccentric English couple after escaping their armed captors. Meanwhile, Alex and Rafiq find Fareeda hiding at her school with a group of female students who have nowhere to go; and Walter defies the president by flying to Israel to meet with the prime minister.moreless
Alex gets advice from Walter before his crucial rendezvous with Raja. Meanwhile, Walter works around a medical emergency and interference from above to cut a deal with India's foreign minister; and Zeke realizes he's promised more than he can deliver to the women in his life.moreless
Beckett conducts a covert investigation related to her mother's murder but things go terribly wrong when the subject under surveillance is killed. Castle and Beckett become the object of a manhunt when evidence connects Beckett to the victim.moreless
Derrick needs help with matters of the heart and Randy comes to the rescue.
Since his break-up with Dallas, George has let himself go. Tessa is concerned enough that she call's George's dad to come help, but the sage advice has the opposite effect. Tessa finds out that Ryan is bringing his new girlfriend for a visit to Chatswin.moreless
In the series finale, Dexter faces impossible odds with The Brain Surgeon on his tale and a vicious hurricane approaching Miami. With no time left, Dexter plans his arrangements for the future.
Dexter, still reeling from Vogel's death, plans to eliminate Oliver Saxon before fleeing the country with Hannah & Harrison. During all of this, the hurricane shuts down the airport and Debra has been shot, leaving Dexter with few options.moreless
Dexter desperately tries to escort Vogel to safety with her increasingly dangerous son on the loose. Meanwhile, Debra learns of Dexter's plans to flee to Argentina with Hannah and Harrison.
Dexter tries to get to the bottom of Zach's murder, whilst at the same time keep Hannah hidden from the US Marshall who has come looking for her. Vogel comes face-to-face with a ghost from her past.
After helping Quinn with some investigative work, Deb toys with the idea of returning to Miami Metro.moreless
Dexter realizes that Zach has killed his neighbor, Cassie, by bludgeoning, and he and Hannah race to the Keys where Zach is located to finish him off. With Hannah still in danger of being caught, she plans for a new identity.moreless
Dexter hunts down Hannah to figure out why she is in Miami. Dexter takes on a protégé and teaches him the code.
Dexter and Quinn both look into Zach Hamilton as a potential murder suspect. Meanwhile, Deb goes undercover in a new case that has personal attachment for Elway.
Dr. Vogel comes into contact with the "Brain Surgeon". Dexter and Deb try to keep her safe. Masuka learns that he has a daughter.
Dexter goes in search of another serial killer from Dr. Vogel list. Quinn passes the seargent exam. Dr. Vogel treats Deb for her PTSD.
Dexter continues the search for the Brain Surgeon. Meanwhile Deb finds help in an unexpected source when her post tramatic stress disorder kicks in.
Miami Metro continues the search for the Brain Surgeon. Dexter finds a clue and attempts to find the Surgeon before his colleagues. Dexter gets a bit closer to Dr. Vogel. Dexter keeps attempting to bridge the gap that has formed between him and Deb. Deb is forced to take matters into her own hands as she tries to find the jewels that Biggs had stolen.moreless
Six Months after LaGuerta's death, Deb has left the police force for private security. Dexter and Deb are barely speaking. A new serial killer dubbed "The Brain Surgeon" is in Miami. Dr. Evelyn Vogel, a psychiatrist known as the "sociopath whisperer" offers her help to Miami Metro. She may hold clues to Dexter's past.moreless
Victoria starts planning a scheme that includes Emily, while Emily locks in on a new target, and Declan learns something that may threaten the Stowaway's future.
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
Rothstein asks Gyp to be his new supplier but has other plans in mind. Gillian worries about her business.
Picking up the morning after, Castle and Beckett now have to decide if they're a couple or was it just a onetime deal. But before they can tackle that, they must deal with those responsible for Kate's mother's death who are now a threat to Beckett.moreless