Dexter learns that his biological father, Joe Driscoll, who he thought had been long dead, has only recently died and has left all of his belongings to Dexter, including his house. Dexter travels to the house with Rita. Debra and Rudy arrive there later to assist him in cleaning out the house. Dexter gets on well with Rudy, but suspects there is something strange about Joe Driscoll's death, and about the identity of Dexter's biological mother. Rudy is insistent on attending the weekend trip, and one of Joe's neighbors thinks that Rudy looks familiar. Flashbacks to Dexter's childhood show his questioning his foster father Harry about his real parents, and Dexter finds that Mr. Driscoll donated some of his blood to the young Dexter for surgery. Meanwhile, Paul begins to slide back into his old abusive habits when he suspects Rita is preventing him from having unsupervised visits to their children.