Blood Drive is the ninth of ten episodes of Dexter: Original Sin.
Synopsis[]
"In the fallout of a SWAT raid gone wrong, Dexter closes in on the child kidnapper; Deb goes to work with her Dad and sees Miami Metro in a new light; Harry digs deeper into the serial killer case but keeps his theory from LaGuerta."
Summary[]
At a retirement home, the residents are playing bingo. A woman, Barbara, is joined by a young man, who helps her with her card and bonds with her. As she introduces herself, he reveals his name is Brian. When Brian wins the game, he invites her to dine with him. He reveals his full name as Brian Moser and sedates her, taking her in his van.
At the hospital, Harry is informed of Bobby's condition. LaGuerta confronts Harry for stealing the file from Tampa's police, and he finally comes clean about Brian's status, but asks her not to interfere. Nevertheless, LaGuerta visits Camilla to check Estrada's file, which she complies, informing Harry that she omitted Dexter's name from all files.
Dexter continuing his plan to kill Spencer, breaks into his apartment to sedate him, but is forced to leave when Spencer arrives accompanied with Harry. The following day, Dexter's investigation into Nicky's status is interrupted when Tanya assigns him to oversee a blood drive for Bobby. Spencer is one of the volunteers, and he and Dexter have a tense conversation over Nicky's disappearance. Clark also wants to donate, but confides in Dexter that he had contact with a man who tested for HIV and is awaiting results to know if he is positive as well, so Dexter agrees to donate blood in Clark's name. Unaware of this, Masuka pressures Dexter to donate more blood in his name. Returning home from donating blood, Debra receives a voice mail from Florida State University; despite her school incident, the volleyball team is still interested in her.
In flashbacks, Harry convinces Spencer to lead a search party for Laura and the kids, but is demoted after revealing his affair. After some time searching the shipyard, the police finally find Dexter and Brian, along with Laura's dismembered body and those of the other victims. As child protective services do not want to separate the brothers and noting that their father is in prison and has renounced his parental rights, Harry and Doris agree to act as foster parents for Dexter and Brian. However, Brian almost smothers a young Debra when she does not stop crying, and attacks Harry when he scolds him before breaking a window. Realizing Brian is a danger to Debra, Harry and Doris reluctantly decide to send Brian away with a social worker, Barbara, but keep Dexter as they have grown attached to him.
While investigating the murders, Harry is shocked to realize that Brian was present at each of the crime scenes. He visits an unconscious Bobby at the hospital, confiding in him that Brian returned and his concerns regarding Dexter knowing about it. Bobby briefly regains consciousness, telling Harry to "Save Dexter". That night, Spencer returns home and finds a note containing a demand for money followed by a threat that he will be exposed if he does not deliver the money. Spencer arrives at the meeting location, an arcade Nicky frequented, and Dexter attacks him. Despite this leading to a struggle, Dexter ultimately manages to sedate Spencer. After awakening on Dexter's kill table, Spencer admits to using Nicky to get back at his ex-wife for cheating on him, as she turned their son against him. Dexter begins torturing Spencer, severing one of his fingers, in order to force him to reveal Nicky's location, before leaving him alone to consider his decision. However, Dexter, seemingly by accident, rips part of the wrap, allowing Spencer to release himself. Spencer flees in his car, unaware that Dexter is following, having set it up to find Nicky's location.
At an undisclosed location, Brian ties Barbara to a pole, scolding her for separating him from Dexter, then uses a chainsaw and begins dismembering her alive.



