John, suspecting the female assailant may be one of Gwen's test subject, confronts Gwen at the laboratory, unaware of the fact that Pete is in one of the test rooms, tied to a chair. After John leaves, Gwen resumes the session, in which she injects a fluid into Pete's eye. After he awakens and is dismissed, Pete goes to have dinner with Caroline, but becomes violently ill, and begins urinating blood. Meanwhile, John has a conversation with his girlfriend, Barbara, about the murders: He deduces that each of the victims are sons of men who previously collaborated with John to investigate the unethical experiments of Le Sange, and believes Le Sange is in fact alive, enacting revenge. Barbara follows John to the cemetery, where he breaks into Le Sange's crypt, and finds the casket empty. John and Barbara return home and find a confused Pete along with Caroline.