Episode Title:The Selfish Gene.Episode Description:Shinichi reunites with Mamoru to come up a plan to capture and interrogate Shiro. Meanwhile, Reiko finds it hard to believe that Shiro was attacked by Migi, despite already knowing about Shinichi's right hand. Shinichi and Mamoru bring Shiro to the abandoned building, where Shinichi explains the truth to Shiro. When Shiro questions why Shinichi has not made any sacrifices for humanity, Migi threatens Shiro, saying that Shinichi already suffered enough thus far. Shiro is shocked when Migi reveals that Reiko is actually a Parasite. The next day, Shinichi meets with Reiko at the roof of a university, where they discuss about the coexistence between humans and Parasites. When Reiko taunts Shinichi about Nobuko's death, the unbearable pain in his chest causes him to run away from the area. Shinichi chances upon a fortune teller, who says that he must find the person who put a hole in his heart to achieve closure, but he laughs at the fact that he killed that person, his mother.