“Dexter learns more about his dark origins from Dr. Evelyn Vogel, an old family friend, while helping her track down the Brain Surgeon, a new serial killer who is terrorizing Miami; Dexter is reunited with Hannah and they plan a life together; Deb suffers the consequences of loving her brother despite everything she knows about him; Batista is made Lieutenant and calls off his retirement; Masuka finds out he has a daughter.”