Dexter has decided to make a new life for himself with Hannah and Harrison but not before he takes care of the Brain Surgeon. In searching Zach Hamilton's photo studio he finds a clump of hair and blood hidden under a table. When Dexter runs the sample against the DNA database he finds a familial match - to Dr. Evelyn Vogel. Somewhat incredulous at his revelation, Vogel explains that she once had two sons, the eldest of which killed the other. He was placed in a mental institution but died in fire. Dexter believes he must have survived and soon has him identified. Deb...