There is another victim of the phantom arsonist, the fifth in two weeks. Dexter thinks has a pretty good idea who is behind it. He is frustrated because he promised Deb not to interfere in police cases. He tries to explain his dark passenger to Hannah but they're interrupted by a man peeking through the window - who turns out to be Hannah's father who has just been released from prison. He wasn't a very good father - he once left her alone in a motel room for three days while he went off to play poker. He seems to have reformed but after she refuses him a loan he turns particularly nasty. Dexter knows how to make things right. Captain LaGuerta tells her old boss, Tom Matthews, that she suspects Dexter is the Bay Harbor Butcher. When he tells her the Ice Truck Killer was Dexter's brother, she knows she's right, even though Matthews disagrees. Quinn goes after Nadia's boss, George Novikov, when he decides to send her out of State to work in another club.